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89 FR 20 pgs. 5773-5794 - Expedited Approval of Alternative Test Procedures for the Analysis of Contaminants Under the Safe Drinking Water Act; Analysis and Sampling Procedures

Type: RULEVolume: 89Number: 20Pages: 5773 - 5794
Docket number: [EPA-HQ-OW-2023-0541; FRL-11620-01-OW]
FR document: [FR Doc. 2024-01530 Filed 1-29-24; 8:45 am]
Agency: Environmental Protection Agency
Official PDF Version:  PDF Version
Pages: 5773, 57745775, 5776, 5778, 5779, 5780, 5781, 5784, 5785, 5788, 5789, 5790, 5791, 5792, 5793,

[top] page 5773

ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 141

[EPA-HQ-OW-2023-0541; FRL-11620-01-OW]

Expedited Approval of Alternative Test Procedures for the Analysis of Contaminants Under the Safe Drinking Water Act; Analysis and Sampling Procedures

AGENCY:

Environmental Protection Agency (EPA).

ACTION:

Final rule.

SUMMARY:

This action announces the Environmental Protection Agency's (EPA's) approval of alternative testing methods for use in measuring the levels of contaminants in drinking water to determine compliance with national primary drinking water regulations. The Safe Drinking Water Act authorizes EPA to approve the use of alternative testing methods through publication in the Federal Register . EPA is using this streamlined authority to make 93 additional methods available for analyzing drinking water samples. This expedited approach provides public water systems, laboratories, and primacy agencies with more timely access to new measurement techniques and greater flexibility in the selection of analytical methods, thereby reducing monitoring costs while maintaining public health protection.

DATES:

This action is effective January 30, 2024.

ADDRESSES:

EPA has established a docket for this action under Docket ID No. EPA-HQ-OW-2023-0541. All documents in the docket are listed on the https://www.regulations.gov website. Although listed in the index, some information is not publicly available, e.g., confidential business information (CBI) or other information whose disclosure is restricted by statute. Certain other material, such as copyrighted material, is not placed on the internet and will be publicly available only in hard copy form. Publicly available docket materials are available electronically through https://www.regulations.gov.

FOR FURTHER INFORMATION CONTACT:

Teresa Wells, Technical Support Branch, Standards and Risk Management Division, Office of Ground Water and Drinking Water (MS 140), Environmental Protection Agency, 26 West Martin Luther King Drive, Cincinnati, OH 45268; telephone number: (513) 569-7128; email address: wells.teresa@epa.gov.


[top] page 5774

SUPPLEMENTARY INFORMATION:

I. General Information

A. Does this action apply to me?

Public water systems are the regulated entities required to measure contaminants in drinking water samples. In addition, EPA Regions as well as States and Tribal governments with authority to administer the regulatory program for public water systems under the Safe Drinking Water Act (SDWA) may measure contaminants in water samples. When EPA sets a monitoring requirement in its national primary drinking water regulations for a given contaminant, the agency also establishes (in the regulations) standardized test procedures for analysis of the contaminant. This action makes alternative testing methods available for particular drinking water contaminants beyond the testing methods currently established in the regulations. EPA is providing public water systems, required to test water samples, with a choice of using either a test procedure already established in the existing regulations or an alternative testing method that has been approved in this action or in prior expedited approval actions. Categories and entities that may ultimately be affected by this action include:

Category Examples of potentially regulated entities NAICS? 1
State, local, & Tribal governments State, local, and Tribal governments that analyze water samples on behalf of public water systems required to conduct such analysis; State, local, and Tribal governments that directly operate community and non-transient non-community water systems required to monitor 924110
Industry Private operators of community and non-transient non-community water systems required to monitor 221310
Municipalities Municipal operators of community and non-transient non-community water systems required to monitor 924110
1 ?North American Industry Classification System.

This table is not intended to be exhaustive, but rather provides a guide for readers regarding entities likely to be interested in this action. Other types of entities not listed in the table could also have some interest. To determine whether your facility is affected by this action, you should carefully examine the applicability language in the Code of Federal Regulations (CFR) at 40 CFR 141.2 (definition of a public water system). If you have questions regarding the applicability of this action to a particular entity, consult the person listed in the preceding FOR FURTHER INFORMATION CONTACT section.

Abbreviations and Acronyms Used in This Action

CFR: Code of Federal Regulations

EPA: United States Environmental Protection Agency

NAICS: North American Industry Classification System

QC: Quality Control

SDWA: The Safe Drinking Water Act

VCSB: Voluntary Consensus Standard Bodies

II. Background

A. What is the purpose of this action?

In this action, EPA is approving 93 analytical methods for determining contaminant concentrations in drinking water samples collected under SDWA. Regulated entities required to sample and monitor may use either the testing methods already established in existing regulations or the alternative testing methods being approved in this action or in prior expedited approval actions. The new methods are listed along with other methods similarly approved through previous expedited actions in 40 CFR part 141, appendix A to subpart C and on EPA's drinking water methods website at https://www.epa.gov/dwanalyticalmethods.

B. What is the basis for this action?

When EPA determines that an alternative analytical method is "equally effective" ( i.e., as effective as a method that has already been promulgated in the regulations), SDWA allows EPA to approve the use of the alternative testing method through publication in the Federal Register (see section 1401(1) of SDWA). EPA is using this streamlined approval authority to make 93 additional methods available for determining contaminant concentrations in drinking water samples collected under SDWA. EPA has determined that, for each contaminant or group of contaminants listed in section III of this preamble, the additional testing methods being approved in this action are as effective as one or more of the testing methods already approved in the regulations for those contaminants. Section 1401(1) of SDWA states that the newly approved methods "shall be treated as an alternative for public water systems to the quality control and testing procedures listed in the regulation." Accordingly, this action makes these additional 93 analytical methods legally available as options for meeting EPA's monitoring requirements.

This action does not add regulatory language, but does, for informational purposes, update an appendix to the regulations at 40 CFR part 141 that lists all methods approved under section 1401(1) of SDWA. Accordingly, while this action is not a rule, it is updating CFR text and therefore is being published in the "Final Rules" section of the Federal Register .

III. Summary of Approvals

EPA is approving 93 methods that are equally effective relative to methods previously promulgated in the regulations. By means of this action, these 93 methods are added to appendix A to subpart C of 40 CFR part 141.

A. Methods Developed by Voluntary Consensus Standard Bodies (VCSB)

1. ASTM International. EPA compared the most recent version of one ASTM International method for determination of radium-226 by radon emanation to the earlier version of the method that is currently approved in 40 CFR 141.25(a). Changes between the earlier approved version and the most recent version of the method are described more fully in Smith 2023. The revisions involve primarily editorial changes ( e.g., updated references, definitions, terminology, procedural clarifications, and reorganization of text). The revised method is the same as the approved version with respect to sample collection and handling protocols, sample preparation, analytical methodology, and method performance data; thus, EPA finds it is equally effective relative to the approved method.


[top] EPA is thus approving the use of the following ASTM method for radium-226 as listed in the following table: page 5775

ASTM revised version Approved method Contaminant Regulation citation
D 3454-21 (ASTM 2021) D 3454-97 (ASTM 1997) Radium-226 40 CFR 141.25(a).

The ASTM method is available from ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959 or https://www.astm.org.

2. Standard Methods for the Examination of Water and Wastewater (Standard Methods). The 24th edition of Standard Methods for the Examination of Water and Wastewater (APHA 2023) was published in 2023. EPA compared 90 methods in the 24th edition to earlier versions of those methods that are currently approved in 40 CFR parts 141 and 143. Changes between the approved version and the version of each method published in the 24th edition are summarized in Smith and Wendelken (2023) and Best (2023). The revisions primarily involve editorial changes ( e.g., correction of errors, procedural clarifications and reorganization of text). The methods in the following table are the same as the earlier approved versions with respect to the sample handling protocols, analytical procedures and method performance data. For these reasons, EPA has concluded that the versions in the 24th edition are equally effective relative to the currently approved versions in the regulations. Therefore, EPA is approving the use of 90 Standard Methods in the 24th edition for the contaminants and their respective regulations listed in the following table:

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Standard methods, 24th edition (APHA 2023) Approved method Contaminant Regulation citations
2120 B 2120 B-01, online version (APHA 2001a) Color 40 CFR 143.4(b).
2130 B 2130 B-01, online version (APHA 2001b) Turbidity 40 CFR 141.74(a)(1).
2150 B 2150 B-97, online version (APHA 1997a) Odor 40 CFR 143.4(b).
2320 B 2320 B-97, online version (APHA 1997b) Alkalinity 40 CFR 141.23(k)(1).
2510 B 2510 B-97, online version (APHA 1997c) Conductivity 40 CFR 141.23(k)(1).
2540 C 2540 C-97, online version (APHA 1997d) Total Dissolved Solids 40 CFR 143.4(b).
2550 2550-00, online version (APHA 2000a) Temperature 40 CFR 141.23(k)(1).
3111 B 3111 B-99, online version (APHA 1999a) Calcium, copper, magnesium, nickel, sodium, iron, manganese, silver, zinc 40 CFR 141.23(k)(1); 40 CFR 143.4(b).
3111 D 3111 D-99, online version (APHA 1999a) Barium, aluminum 40 CFR 141.23(k)(1); 40 CFR 143.4(b).
3112 B 3112 B-99, online version (APHA 1999b) Mercury 40 CFR 141.23(k)(1).
3113 B 3113 B, 19th Edition (APHA 1995) Antimony, arsenic, barium, beryllium, cadmium, chromium, copper, lead, nickel, selenium, aluminum, iron, manganese, silver 40 CFR 141.23(k)(1); 40 CFR 143.4(b).
3114 B 3114 B-97, online version (APHA 1997e) Arsenic, selenium 40 CFR 141.23(k)(1).
3120 B 3120 B-99, online version (APHA 1999c) Barium, beryllium, calcium, chromium, copper, magnesium, nickel, silica, aluminum, iron, manganese, silver, zinc 40 CFR 141.23(k)(1); 40 CFR 143.4(b).
3500-Ca B 3500-Ca B-97, online version (APHA 1997f) Calcium 40 CFR 141.23(k)(1).
3500-Mg B 3500-Mg B-97, online version (APHA 1997g) Magnesium 40 CFR 141.23(k)(1).
4110 B 4110 B-00, online version (APHA 2000b) Fluoride, nitrate, nitrite, ortho-phosphate, chloride, sulfate 40 CFR 141.23(k)(1); 40 CFR 143.4(b).
4500-Cl D,F,G,H 4500-Cl D,F,G,H-00, online versions (APHA 2000c) Free chlorine 40 CFR 141.74(a)(2); 40 CFR 141.131(c)(1).
4500-Cl D,E,F,G,I 4500-Cl D,E,F,G,I-00, online versions (APHA 2000c) Total chlorine 40 CFR 141.74(a)(2); 40 CFR 141.131(c)(1).
4500-Cl D,F,G 4500-Cl D,F,G-00, online versions (APHA 2000c) Combined chlorine 40 CFR 141.131(c)(1).
4500-Cl - B,D 4500-Cl - B,D-97, online versions (APHA 1997h) Chloride 40 CFR 143.4(b).
4500-ClO 2 C 4500-ClO 2 C-00, online version (APHA 2000d) Chlorine dioxide 40 CFR 141.74(a)(2).
4500-ClO 2 E 4500-ClO 2 E-00, online version (APHA 2000d) Chlorine dioxide 40 CFR 141.74(a)(2); 40 CFR 141.131(c)(1).
4500-ClO 2 E 4500-ClO 2 E-00, online version (APHA 2000d) Chlorite 40 CFR 141.131(b)(1).
4500-CN - C,E,F,G 4500-CN - C,E,F,G, 20th Edition (APHA 1998) Cyanide 40 CFR 141.23(k)(1).
4500-F - B,C,D,E 4500-F - B,C,D,E-97, online versions (APHA 1997i) Fluoride 40 CFR 141.23(k)(1).
4500-H + B 4500-H + B-00, online version (APHA 2000e) pH 40 CFR 141.23(k)(1).
4500-NO 3 - D 4500-NO 3 - D-00, online version (APHA 2000f) Nitrate 40 CFR 141.23(k)(1).
4500-NO 3 - E,F 4500-NO 3 - E,F-00, online versions (APHA 2000f) Nitrate, nitrite 40 CFR 141.23(k)(1).
4500-NO 2 - B 4500-NO 2 - B-00, online version (APHA 2000g) Nitrite 40 CFR 141.23(k)(1).
4500-O 3 B 4500-O 3 B-97, online version (APHA 1997j) Ozone 40 CFR 141.74(a)(2).
4500-P E,F 4500-P E,F, 19th Edition, (APHA 1995) Ortho-phosphate 40 CFR 141.23(k)(1).
4500-SiO 2 C,D,E 4500-SiO 2 C,D,E-97, online versions (APHA 1997k) Silica 40 CFR 141.23(k)(1).
4500-SO 4 2 - C,D,E,F 4500-SO 4 2 - C,D,E,F, 19th Edition (APHA 1995) Sulfate 40 CFR 143.4(b).
5310 B,C. 5310 B,C-00, online versions (APHA 2000h) Dissolved and Total Organic Carbon 40 CFR 141.131(d).
5540 C 5540 C-00, online version (APHA 2000i) Foaming agents 40 CFR 143.4(b).
5910 B 5910 B-00, online version (APHA 2000j) UV Absorption at 254 nm 40 CFR 141.131(d).
6251 B 6251 B-94, online version (APHA 1994) HAA5 40 CFR 141.131(b)(1).
6610 B EPA Method 531.2, Rev. 1.0 (USEPA 2001) Carbofuran, oxamyl 40 CFR 141.24(e)(1).
6640 B EPA Method 515.4, Rev. 1.0 (USEPA 2000) 2,4-D; 2,4,5-TP; Dalapon; Dinoseb; Pentachlorophenol; Picloram 40 CFR 141.24(e)(1).
6651 B 6651 B, 20th Edition, (APHA 1998) Glyphosate 40 CFR 141.24(e)(1).
7110 B 7110 B-00, online version (APHA 2000k) Gross alpha and gross beta 40 CFR 141.25(a).
7110 C 7110 C-00, online version (APHA 2000k) Gross alpha 40 CFR 141.25(a).
7110 D EPA Method 900.0 (USEPA 1980) Gross alpha and gross beta 40 CFR 141.25(a).
7120 7120-97, online version (APHA 1997l) Gamma emitters (includes radioactive cesium and iodine) 40 CFR 141.25(a).
7500-Cs B 7500-Cs B-00, online version (APHA 2000l) Radioactive Cesium and Gamma emitters 40 CFR 141.25(a).
7500- 3 H B 7500- 3 H B-00, online version (APHA 2000m) Tritium 40 CFR 141.25(a).
7500-I B 7500-I B-00, online version (APHA 2000n) Radioactive Iodine and Gamma emitters 40 CFR 141.25(a).
7500-I C,D 7500-I C,D-00, online versions (APHA 2000n) Radioactive Iodine 40 CFR 141.25(a).
7500-Ra B,C 7500-Ra B,C-01, online versions (APHA 2001c) Radium-226 40 CFR 141.25(a).
7500-Ra D 7500-Ra D-01, online version (APHA 2001c) Radium-228 40 CFR 141.25(a).
7500-Ra E GA Method (2004) Radium-226 and Radium-228 40 CFR 141.25(a).
7500-Sr B 7500-Sr B-01, online version (APHA 2001d) Strontium-89 and Strontium-90 40 CFR 141.25(a).
7500-U B,C 7500-U B,C-00, online versions (APHA 2000o) Uranium 40 CFR 141.25(a).
9221 A,C 9221 A,C, 20th Edition, (APHA 1998) Total coliforms 40 CFR 141.74(a)(1).
9221 B 9221 B, 20th Edition, (APHA 1998) Total coliforms 40 CFR 141.74(a)(1) 40 CFR 141.852(a)(5) [B.1, B.2, B.3, B.4].
9221 D 9221 D, 20th Edition, (APHA 1998) Total coliforms 40 CFR 141.852(a)(5) [D.1, D.2, D.3].
9221 E 9221 E, 20th Edition, (APHA 1998) Fecal coliforms 40 CFR 141.74(a)(1).
9221 F 9221 F, 20th Edition, (APHA 1998) E. coli 40 CFR 141.402(c)(2) 40 CFR 141.852(a)(5) [F.1].
9222 A 9222 A 20th Edition, (APHA 1998) Total coliforms 40 CFR 141.74(a)(1).
9222 B,C 9222 B,C, 20th Edition, (APHA 1998) Total coliforms 40 CFR 141.74(a)(1) 40 CFR 141.852(a)(5).
9222 D 9222 D, 20th Edition, (APHA 1998) Fecal coliforms 40 CFR 141.74(a)(1).
9222 H 9222 G, 20th Edition, (APHA 1998) E. coli 40 CFR 141.852(a)(5).
9222 I 9222 G, 20th Edition, (APHA 1998) E. coli 40 CFR 141.402(c)(2) 40 CFR 141.852(a)(5).
9222 J m-ColiBlue24 Test (Hach Company 1999) Total coliforms 40 CFR 141.852(a)(5).
9222 J m-ColiBlue24 Test (Hach Company 1999) E. coli 40 CFR 141.402(c)(2) 40 CFR 141.852(a)(5).
9223 B 9223 B, 20th Edition (APHA 1998) Total coliforms 40 CFR 141.74(a)(1); 40 CFR 141.852(a)(5).
9223 B 9223 B, 20th Edition (APHA 1998) E. coli 40 CFR 141.402(c)(2); 40 CFR 141.852(a)(5).
9230 B 9230 C, 20th Edition (APHA 1998) Enterococci 40 CFR 141.402(c)(2).
9230 C 9230 C, 20th Edition (APHA 1998) Enterococci 40 CFR 141.402(c)(2).
9230 D (Budnick 1996) Enterococci 40 CFR 141.402(c)(2).


The 24th edition can be obtained from the American Public Health Association (APHA), 800 I Street NW, Washington, DC 20001-3710. Approved online versions are available at http://www.standardmethods.org.

B. Methods Developed by Vendors

1. Hach Method 10312-Spectrophotometric Measurement of Fluoride in Finished Drinking Water Aluminum-Chromeazurol S complex (AL-CAS) Using Planar Reagent-filled Cuvettes (Hach 2022a). Hach Method 10312 uses a reagent solution containing an intensely colored aluminum-chromeazurol S complex. The presence of fluoride in the sample removes aluminum from the complex, releasing the free chromeazurol S ion. The free chromeazurol S ion has peak absorbance in a different region of the visible spectrum. The quantifiable change in absorbance is directly proportional to the fluoride concentration. Test results are measured at 427 nm using a colorimeter.

Approved methods for fluoride are listed at 40 CFR 141.23(k)(1). The performance characteristics of Hach Method 10312 were compared to the performance characteristics of the approved Standard Methods 4500-F D (Standard Methods 1997i). The validation study report (Hach 2022b) summarizes the results obtained from three different facilities and laboratories. Method detection limits and method limits, precision and accuracy performance in high and low ionic strength water, and matrix spike studies were determined at all sites.

EPA has determined that Hach Method 13012 is equally effective relative to Standard Methods 4500-F D. The basis for this determination is discussed in Adams 2023a. Therefore, EPA is approving the Hach Method 10312 for determining fluoride in drinking water. A copy of the method is available from Hach Company, 5600 Lindbergh Drive, Loveland, Colorado 80539.

2. Yokogawa Method 820-Measurement of Turbidity in Drinking Water by Right Angle Scattered Light Turbidity Analyzer (Yokogawa 2022a). Yokogawa Method 820 uses a right-angle scattering turbidimeter with an LED light source with a peak emitting wavelength between 650 and 670 nm. The method is based upon a comparison of the intensity of light scattered by the sample under defined conditions with the intensity of light scattered by a standard reference suspension.

Approved methods for turbidity are listed at 40 CFR 141.74(a)(1). The performance characteristics of the Yokogawa Method 820 were compared to the performance characteristics of the approved EPA Method 180.1 (USEPA 1993). The validation study report (Yokogawa 2022b) summarizes the results obtained from the turbidimeters tested at three different utilities. Method resolution, linearity, limits of detection, and precision and accuracy were determined at the first site, with subsequent sites evaluating precision and accuracy performance.

EPA has determined that the Yokogawa Method 820 is equally effective relative to EPA Method 180.1. The basis for this determination is discussed in Adams 2023b. Therefore, EPA is approving the Yokogawa Method 820 for determining turbidity in drinking water. A copy of the method is available from Yokogawa Electric Corporation, 2-9-32 Nakamachi, Musashino-shi, Tokyo, Japan 180-8750.

IV. Statutory and Executive Order Reviews

As noted in section II of this preamble, under the terms of SDWA section 1401(1), this streamlined method approval action is not a rule. Accordingly, the Congressional Review Act, 5 U.S.C. 801 et seq., as added by the Small Business Regulatory Enforcement Fairness Act of 1996, does not apply because this action is not a rule for purposes of 5 U.S.C. 804(3). Similarly, this action is not subject to the Regulatory Flexibility Act because it is not subject to notice and comment requirements under the Administrative Procedure Act or any other statute. In addition, because this approval action is not a rule, but simply makes alternative testing methods available as options for monitoring under SDWA, EPA has concluded that other statutes and executive orders generally applicable to rulemaking do not apply to this approval action.

V. References

Adams, W. 2023a. Memo to the record describing basis for expedited approval of Hach Method 10312. May 9, 2023. (Available at https://www.regulations.gov; docket ID No. EPA-HQ-OW-2023-0541.)

Adams, W. 2023b. Memo to the record describing basis for expedited approval of Yokogawa Method 820. May 9, 2023. (Available at https://www.regulations.gov; docket ID No. EPA-HQ-OW-2023-0541.)

American Public Health Association (APHA). 1994. Standard Method 6251 B-94. Disinfection By-Products: Haloacetic Acids and Trichlorophenol. B. Micro Liquid-Liquid Extraction Gas Chromatographic Method. Approved by Standard Methods Committee 1994. Standard Methods Online (Available at https://www.standardmethods.org )

American Public Health Associate (APHA). 1995. 19th Edition of Standard Methods for the Examination of Water and Wastewater. American Public Health Association, 800 I Street NW, Washington, DC 20001-3710.

American Public Health Association (APHA). 1997a. Standard Method 2150 B-97. Odor. B. Threshold Odor Test. Approved by Standard Methods Committee 1997. Standard Methods Online (Available at https://www.standardmethods.org )

American Public Health Association (APHA). 1997b. Standard Method 2320 B-97. Alkalinity. B. Titration Method. Approved by Standard Methods Committee 1997. Standard Methods Online (Available at https://www.standardmethods.org )

American Public Health Association (APHA). 1997c. Standard Method 2510 B-97. Conductivity. B. Laboratory Method. Approved by Standard Methods Committee 1997. Standard Methods Online (Available at https://www.standardmethods.org )

American Public Health Association (APHA). 1997d. Standard Method 2540 C-97. Solids. C. Total Dissolved Solids Dried at 180?°C. Approved by Standard Methods Committee 1997. Standard Methods Online (Available at https://www.standardmethods.org )


[top] American Public Health Association (APHA). 1997e. Standard Method 3114 B-97. Arsenic and Selenium by Hydride Generation/Atomic Emission Spectrometry. B. Manual Hydride Generation/Atomic Absorption page 5778 Spectrometric Method. Approved by Standard Methods Committee 1997. Standard Methods Online (Available at https://www.standardmethods.org )

American Public Health Association (APHA). 1997f. Standard Method 3500-Ca B-97. Calcium. B. EDTA Titrimetric Method. Approved by Standard Methods Committee 1997. Standard Methods Online (Available at https://www.standardmethods.org )

American Public Health Association (APHA). 1997g. Standard Method 3500-Mg B-97. Magnesium. B. Calculation Method. Approved by Standard Methods Committee 1997. Standard Methods Online (Available at https://www.standardmethods.org )

American Public Health Association (APHA). 1997h. Standard Methods 4500-Cl - B, D-97. Chloride. B. Argentometric Method. D. Potentiometric Method. Approved by Standard Methods Committee 1997. Standard Methods Online (Available at https://www.standardmethods.org )

American Public Health Association (APHA). 1997i. Standard Methods 4500-F - B, C, D, E-97. Fluoride. B. Preliminary Distillation Step. C. Ion-Selective Electrode Method. D. SPADNS Method. E. Complexone Method. Approved by Standard Methods Committee 1997. Standard Methods Online (Available at https://www.standardmethods.org )

American Public Health Association (APHA). 1997j. Standard Method 4500-O 3 B-97. Ozone (Residual). B. Indigo Colorimetric Method. Approved by Standard Methods Committee 1997. Standard Methods Online (Available at https://www.standardmethods.org )

American Public Health Association (APHA). 1997k. Standard Methods 4500-SiO 2 C, D, E-97. Silica. C. Molybdosilicate Method. D. Heteropoly Blue Method. E. Automated Method for Molybdate-Reactive Silica. Approved by Standard Methods Committee 1997. Standard Methods Online (Available at https://www.standardmethods.org )

American Public Health Association (APHA). 1997l. Standard Method 7120 B-97. Gamma-Emitting Radionuclides. B. Gamma Spectroscopic Method. Approved by Standard Methods Committee 1997. Standard Methods Online (Available at https://www.standardmethods.org )

American Public Health Association (APHA). 1998. 20th Edition of Standard Methods for the Examination of Water and Wastewater. American Public Health Association, 800 I Street NW, Washington, DC 20001-3710.

American Public Health Association (APHA). 1999a. Standard Methods 3111 B, D-99. Metals by Flame Atomic Absorption Spectrometry. B. Direct Air-Acetylene Flame Method. D. Direct Nitrous Oxide-Acetylene Flame Method. Approved by Standard Methods Committee 1999. Standard Methods Online (Available at https://www.standardmethods.org )

American Public Health Association (APHA). 1999b. Standard method 3112 B-99. Metals by Cold-Vapor Atomic Absorption Spectrometry. B. Cold-Vapor Spectrometric Method. Approved by Standard Methods Committee 1999. Standard Methods Online (Available at https://www.standardmethods.org )

American Public Health Association (APHA). 1999c. Standard Method 3120 B-99. Metals by Plasma Emission Spectroscopy. B. Inductively Coupled Plasma (ICP) Method. Approved by Standard Methods Committee 1999. Standard Methods Online (Available at https://www.standardmethods.org )

American Public Health Association (APHA). 1999d. Standard Method 4500-CN-C-99. Cyanide. C. Total Cyanide after Distillation. Approved by Standard Methods Committee 1999. Standard Methods Online (Available at https://www.standardmethods.org )

American Public Health Association (APHA). 2000a. Standard Method 2550-00. Temperature. Approved by Standard Methods Committee 2000. Standard Methods Online (Available at https://www.standardmethods.org )

American Public Health Association (APHA). 2000b. Standard Method 4110 B-00. Determination of Anions by Ion Chromatography. B. Ion Chromatography with Chemical Suppression of Eluent Conductivity. Approved by Standard Methods Committee 2000. Standard Methods Online (Available at https://www.standardmethods.org )

American Public Health Association (APHA). 2000c. Standard Methods 4500-Cl D, E, F, G, H, I-00. Chlorine (Residual). D. Amperometric Titration Method. E. Low-Level Amperometric Titration Method. F. DPD Ferrous Titrimetric Method. G. DPD Colorimetric Method. H. Syringaldehyde (FACTS) Method. I. Iodometric Electrode Technique. Approved by Standard Methods Committee 2000. Standard Methods Online (Available at https://www.standardmethods.org )

American Public Health Association (APHA). 2000d. Standard Methods 4500-ClO 2 C, E-00. Chlorine Dioxide. C. Amperometric Method I. E. Amperometric Method II. Approved by Standard Methods Committee 2000. Standard Methods Online (Available at https://www.standardmethods.org )

American Public Health Association (APHA). 2000e. Standard Method 4500-H + B-00. pH Value. B. Electrometric Method. Approved by Standard Methods Committee 2000. Standard Methods Online (Available at https://www.standardmethods.org )

American Public Health Association (APHA). 2000f. Standard Methods 4500-NO 3 -D, E, F-00. Nitrogen (Nitrate). D. Nitrate Electrode Method. E. Cadmium Reduction Method. F. Automated Cadmium Reduction Method. Approved by Standard Methods Committee 2000. Standard Methods Online (Available at https://www.standardmethods.org )

American Public Health Association (APHA). 2000g. Standard Method 4500-NO 2 -B-00. Nitrogen (Nitrite). B. Colorimetric Method. Approved by Standard Methods Committee 2000. Standard Methods Online (Available at https://www.standardmethods.org )

American Public Health Association (APHA). 2000h. Standard Methods 5310 B, C-00. Total Organic Carbon (TOC). B. High Temperature Combustion Method. C. Persulfate-Ultraviolet or Heated Persulfate Oxidation Method. Approved by Standard Methods Committee 2000. Standard Methods Online (Available at https://www.standardmethods.org )

American Public Health Association (APHA). 2000i. Standard Method 5540 C-00. Surfactants. C. Anionic Surfactants as MBAs. Approved by Standard Methods Committee 2000. Standard Methods Online (Available at https://www.standardmethods.org )

American Public Health Association (APHA). 2000j. Standard Method 5910 B-00. UV-Absorbing Organic Constituents. B. Ultraviolet Absorption Method. Approved by Standard Methods Committee 2000. Standard Methods Online (Available at https://www.standardmethods.org )

American Public Health Association (APHA). 2000k. Standard Methods 7110 B,C-00. Gross Alpha and Gross Beta Radioactivity (Total, Suspended, and Dissolved). B. Evaporation Method for Gross Alpha-Beta. C. Coprecipitation Method for Alpha Radioactivity in Drinking Water. Approved by Standard Methods Committee 2000. Standard Methods Online (Available at https://www.standardmethods.org )

American Public Health Association (APHA). 2000l. Standard Method 7500-Cs B-00. Radioactive Cesium. B. Precipitation Method. Approved by Standard Methods Committee 2000. Standard Methods Online (Available at https://www.standardmethods.org )

American Public Health Association (APHA). 2000m. Standard Method 7500- 3 H B-00. Tritium. Liquid Scintillation Spectrometric Method. Approved by Standard Methods Committee 2000. Standard Methods Online (Available at https://www.standardmethods.org )

American Public Health Association (APHA). 2000n. Standard Methods 7500-I B, C, D-00. Radioactive Iodine. B. Precipitation Method. C. Ion-Exchange Method. D. Distillation Method. Approved by Standard Methods Committee 2000. Standard Methods Online (Available at https://www.standardmethods.org )

American Public Health Association (APHA). 2000o. Standard Methods 7500-U B, C-00. Uranium. B. Radiochemical Method. C. Isotopic Method. Approved by Standard Methods Committee 2000. Standard Methods Online (Available at https://www.standardmethods.org )

American Public Health Association (APHA). 2001a. Standard Method 2120 B-01. Color. B. Visual Comparison Method. Approved by Standard Methods Committee 2001. Standard Methods Online (Available at https://www.standardmethods.org )


[top] American Public Health Association (APHA). 2001b. Standard Method 2130 B-01. page 5779 Turbidity. B. Nephelometric Method. Approved by Standard Methods Committee 2001. Standard Methods Online (Available at https://www.standardmethods.org )

American Public Health Association (APHA). 2001c. Standard Methods 7500-Ra B, C, D, E-01. Radium. B. Precipitation Method. C. Emanation Method. D. Sequential Precipitation. E. Gamma Spectroscopy Method. Approved by Standard Methods Committee 2001. Standard Methods Online (Available at https://www.standardmethods.org )

American Public Health Association (APHA). 2001d. Standard Method 7500-Sr B-01. Total Radioactive Strontium and Strontium-90. B. Precipitation Method. Approved by Standard Methods Committee 2000. Standard Methods Online (Available at https://www.standardmethods.org )

American Public Health Association (APHA). 2023. 24th Edition of Standard Methods for the Examination of Water and Wastewater. American Public Health Association, 800 I Street NW, Washington, DC 20001-3710.

ASTM International. 1997. ASTM D 3454-97. Standard Test Method for Radium-226 in Water. ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959. (Available at https://www.astm.org. )

ASTM International. 2021. ASTM D 3454-21. Standard Test Method for Radium-226 in Water. ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959. (Available at https://www.astm.org. )

Best, J. 2023. Memo to the record describing basis for expedited approval of methods in the 24th edition of Standard Methods for the Examination of Water and Wastewater. August 10, 2023. (Available at https://www.regulations.gov; docket ID No. EPA-HQ-OW-2023-0541.)

Budnick. 1996. Evaluation of Enterolert for Enumeration of Enterococci in Recreational Waters, Applied and Environmental Microbiology, October 1996, p. 3881-3884.

GA. 2004. Method for the Determination of Radium-228 and Radium-226 in Drinking Water by Gamma-ray Spectrometry using HPGE or Ge(Li) Detectors. December 2004. Revision 1.2. Environmental Resource Center, Georgia Institute for Technology, 620 Cherry Street, Atlanta, Georgia 30332-0335. (Available at https://www.regulations.gov; docket ID No. EPA-HQ-OW-2023-0541.)

Hach Company. 2022a. Hach Method 10312. Spectrophotometric Measurement of Fluoride in Finished Drinking Water Aluminum-Chromeazurol S complex (AL-CAS) Using Planar Reagent-filled Cuvettes. August 2022. Revision 1.0. Hach Company, 5600 Lindbergh Drive, Loveland, Colorado 80539. (Available at https://www.regulations.gov; docket ID No. EPA-HQ-OW-2023-0541.)

Hach Company. 2022b. Alternate Test Procedure (ATP) Validation Study Report of Hach Method 10312 for the Determination of Fluoride in Finished Drinking Water Using Planar Reagent-filled Cuvettes. August 2022. Hach Company, 5600 Lindbergh Drive, Loveland, Colorado 80539. (Available at https://www.regulations.gov; docket ID No. EPA-HQ-OW-2023-0541.)

Hach Company. 1999. Total Coliforms and E. coli Membrane Filtration Method m-ColiBlue24® Broth. August 1999. Revision 2. Hach Company, 5600 Lindbergh Drive, P.O. Box 389, Loveland, CO 80539. (Available at https://www.regulations.gov; docket ID No. EPA-HQ-OW-2023-0541.)

Smith, G. 2023. Memo to the record describing basis for expedited approval of updated method from ASTM International. April 2023. (Available at https://www.regulations.gov; docket ID No. EPA-HQ-OW-2023-0541.)

Smith, G. and Wendelken, S. 2023. Memo to the record describing basis for expedited approval of methods in the 24th edition of Standard Methods for the Examination of Water and Wastewater. June 2023. (Available at https://www.regulations.gov; docket ID No. EPA-HQ-OW-2023-0541.)

USEPA. 1980. EPA Method 904.0. Radium-228 in Drinking Water in "Prescribed Procedures for Measurement of Radioactivity in Drinking Water," EPA-600/4-80-032, August 1980. (Available at https://www.regulations.gov; docket ID No. EPA-HQ-OW-2023-0541.)

USEPA. 1993. EPA Method 180.1, Revision 2.0. Determination of Turbidity by Nephelometry in "Methods for the Determination of Inorganic Substances in Environmental Samples," EPA/600/R-93/100, August 1993. (Available at https://www.regulations.gov; docket ID No. EPA-HQ-OW-2023-0541.)

USEPA. 2000. EPA Method 515.4, Revision 1.0. Determination of Chlorinated Acids in Drinking Water by Liquid-Liquid Microextraction, Derivatization and Fast Gas Chromatography with Electron Capture Detection. EPA/815/B-00/001. April 2000. (Available at https://www.regulations.gov; docket ID No. EPA-HQ-OW-2023-0541 and at https://www.nemi.gov. )

USEPA. 2001. EPA Method 531.2, Revision 1.0. Measurement of N-methylcarbamoyloximes and N-methylcarbamates in Water by Direct Aqueous Injection HPLC with Postcolumn Derivatization. EPA 815-B-01-002. September 2001. (Available at https://www.regulations.gov; docket ID No. EPA-HQ-OW-2023-0541 and at https://www.nemi.gov. )

Yokogawa Electric Corporation. 2022a. Yokogawa Method 820. Measurement of Turbidity in Drinking Water by Right Angle Scattered Light Turbidity Analyzer. November 30, 2022. Revision 1.0. Yokogawa Electric Corporation, 2-9-32 Nakamachi, Musashino-shi, Tokyo, Japan 180-8750. (Available at https://www.regulations.gov; docket ID No. EPA-HQ-OW-2023-0541.)

Yokogawa Electric Corporation. 2022b. Alternate Test Procedure (ATP) Validation Study Report of Yokogawa Method 820 for the Measurement of Turbidity in Drinking Water by Right Angle Scattered Light Turbidity Analyzer. November 8, 2022. Yokogawa Electric Corporation, 2-9-32 Nakamachi, Musashino-shi, Tokyo, Japan 180-8750. (Available at https://www.regulations.gov; docket ID No. EPA-HQ-OW-2023-0541.)

List of Subjects in 40 CFR Part 141

Environmental protection, Chemicals, Indians-lands, Intergovernmental relations, Reporting and recordkeeping requirements, Water supply.

Jennifer L. McLain,

Director, Office of Ground Water and Drinking Water.

For the reasons stated in the preamble, the Environmental Protection Agency amends 40 CFR part 141 as follows:

PART 141-NATIONAL PRIMARY DRINKING WATER REGULATIONS

1. The authority citation for part 141 continues to read as follows:

Authority:

42 U.S.C. 300f, 300g-1, 300g-2, 300g-3, 300g-4, 300g-5, 300g-6, 300j-4, 300j-9, and 300j-11.

2. Amend Appendix A to subpart C of part 141 by:

a. Revising the table entitled "Alternative Testing Methods for Contaminants Listed at 40 CFR 141.23(k)(1)";

b. Revising the table entitled "Alternative Testing Methods for Contaminants Listed at 40 CFR 141.24(e)(1)";

c. Revising the table entitled "Alternative Testing Methods for Contaminants Listed at 40 CFR 141.25(a)";

d. Revising the table entitled "Alternative Testing Methods for Contaminants Listed at 40 CFR 141.74(a)(1)";

e. Revising the table entitled "Alternative Testing Methods for Disinfectant Residuals Listed at 40 CFR 141.74(a)(2)";

f. Revising the table entitled "Alternative Testing Methods for Contaminants Listed at 40 CFR 141.131(b)(1)";

g. Revising the table entitled "Alternative Testing Methods for Disinfectant Residuals Listed at 40 CFR 141.131(c)(1)";

h. Revising the table entitled "Alternative Testing Methods for Parameters Listed at 40 CFR 141.131(d)";


[top] i. Revising the table entitled "Alternative Testing Methods for Contaminants Listed at 40 CFR 141.402(c)(2)"; page 5780

j. Revising the table entitled "Alternative Testing Methods for Contaminants Listed at 40 CFR 141.852(a)(5)";

k. Revising the table entitled "Alternative Testing Methods for Contaminants Listed at 40 CFR 143.4(b)";

The revisions and additions read as follows:

Appendix A to Subpart C of Part 141-Alternative Testing Methods Approved for Analyses Under the Safe Drinking Water Act

page 5781page 5782page 5783


[top] 
Contaminant Methodology EPA method SM 21st edition? 1 SM 22nd edition? 28 SM 23rd edition, 49 SM 24th edition? 66 SM online? 3 ASTM? 4 Other
Alkalinity Titrimetric 2320 B 2320 B 2320 B D1067-06 B, 11 B, 16 B
Antimony Hydride-Atomic Absorption D 3697-07, -12, -17
Atomic Absorption; Furnace 3113 B 3113 B 3113 B 3113 B-04, B-10
Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.2? 2
Arsenic Atomic Absorption; Furnace 3113 B 3113 B 3113 B 3113 B-04, B-10 D 2972-08 C, -15 C
Hydride Atomic Absorption 3114 B 3114 B 3114 B 3114 B-09 D 2972-08 B, -15 B
Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.2? 2
Barium Inductively Coupled Plasma 3120 B 3120 B 3120 B
Atomic Absorption; Direct 3111 D 3111 D 3111 D
Atomic Absorption; Furnace 3113 B 3113 B 3113 B 3113 B-04, B-10
Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.2? 2
Beryllium Inductively Coupled Plasma 3120 B 3120 B 3120 B
Atomic Absorption; Furnace 3113 B 3113 B 3113 B 3113 B-04, B-10 D 3645-08 B, -15 B
Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.2? 2
Cadmium Atomic Absorption; Furnace 3113 B 3113 B 3113 B 3113 B-04, B-10
Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.2? 2
Calcium EDTA titrimetric 3500-Ca B 3500-Ca B 3500-Ca B D 511-09, -14 A
Atomic Absorption; Direct Aspiration 3111 B 3111 B 3111 B D 511-09, -14 B
Inductively Coupled Plasma 3120 B 3120 B 3120 B
Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.2? 2
Ion Chromatography D 6919-09, -17
Chromium Inductively Coupled Plasma 3120 B 3120 B 3120 B
Atomic Absorption; Furnace 3113 B 3113 B 3113 B 3113 B-04, B-10
Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.2? 2
Copper Atomic Absorption; Furnace 3113 B 3113 B 3113 B 3113 B-04, B-10 D 1688-07, -12 C, 17 C
Atomic Absorption; Direct Aspiration 3111 B 3111 B 3111 B D 1688-07, -12 A, 17 A
Inductively Coupled Plasma 3120 B 3120 B 3120 B
Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.2? 2
Colorimetry Hach Method 8026, 35 Hach Method 10272. 36
Conductivity Conductance 2510 B 2510 B 2510 B D 1125-14 A
Cyanide Manual Distillation with MgCl 2 followed by: 4500-CN - C 4500-CN - C 4500-CN - C 4500-CN - C-99 D 2036-06 A
Spectrophotometric, Amenable 4500-CN - G 4500-CN - G 4500-CN - G D 2036-06 B
Spectrophotometric Manual 4500-CN - E 4500-CN - E 4500-CN - E D2036-06 A
Selective Electrode 4500-CN - F 4500-CN - F 4500-CN - F
Gas Chromatography/Mass Spectrometry Headspace ME355.01. 7
Fluoride Ion Chromatography 4110 B 4110 B 4110 B D 4327-11, -17
Manual Distillation; Colorimetric SPADNS 4500-F - B, D 4500-F - B, D 4500-F - B, D
Manual Electrode 4500-F - C 4500-F - C 4500-F - C D 1179-04, 10 B, 16 B
Automated Alizarin 4500-F - E 4500-F - E 4500-F - E
Arsenite-Free Colorimetric SPADNS Hach SPADNS 2 Method 10225, 22 Hach Method 10312. 67
Lead Atomic Absorption; Furnace 3113 B 3113 B 3113 B 3113 B-04, B-10 D 3559-08 D, 15 D
Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.2? 2
Differential Pulse Anodic Stripping Voltametry Method 1001, Rev. 1.1. 57
Magnesium Atomic Absorption 3111 B 3111 B 3111 B D 511-09, -14 B
Inductively Coupled Plasma 3120 B 3120 B 3120 B
Complexation Titrimetric Methods 3500-Mg B 3500-Mg B 3500-Mg B D 511-09, -14 A
Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.2? 2
Ion Chromatography D 6919-09, -17
Mercury Manual, Cold Vapor 3112 B 3112 B 3112 B 3112 B-09 D 3223-12, -17
Nickel Inductively Coupled Plasma 3120 B 3120 B 3120 B
Atomic Absorption; Direct 3111 B 3111 B 3111 B
Atomic Absorption; Furnace 3113 B 3113 B 3113 B 3113 B-04, B-10
Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.2? 2
Nitrate Ion Chromatography 4110 B 4110 B 4110 B D 4327-11, -17
Automated Cadmium Reduction 4500-NO 3 - F 4500-NO 3 - F 4500-NO 3 - F
Manual Cadmium Reduction 4500-NO 3 - E 4500-NO 3 - E 4500-NO 3 - E
Ion Selective Electrode 4500-NO 3 - D 4500-NO 3 - D 4500-NO 3 - D
Reduction/Colorimetric Systea Easy (1-Reagent), 8 NECi Nitrate-Reductase. 40
Colorimetric; Direct Hach TNTplus TM 835/836 Method 10206. 23
Capillary Ion Electrophoresis D 6508-15
Nitrite Ion Chromatography 4110 B 4110 B 4110 B D 4327-11, -17
Automated Cadmium Reduction 4500-NO 3 - F 4500-NO 3 - F 4500-NO 3 - F
Manual Cadmium Reduction 4500-NO 3 - E 4500-NO 3 - E 4500-NO 3 - E
Spectrophotometric 4500-NO 2 - B 4500-NO 2 - B 4500-NO 2 - B
Reduction/Colorimetric Systea Easy (1-Reagent), 8 NECi Nitrate-Reductase. 40
Capillary Ion Electrophoresis D 6508-15
Ortho-phosphate Ion Chromatography 4110 B 4110 B 4110 B D 4327-11, -17
Colorimetric, ascorbic acid, single reagent 4500-P E 4500-P E 4500-P E 4500-P E-99
Colorimetric, Automated, Ascorbic Acid 4500-P F 4500-P F 4500-P F 4500-P F-99 Thermo Fisher Discrete Analyzer. 41
Capillary Ion Electrophoresis D 6508-15
pH Electrometric 48 ?150.3 4500-H + B 4500-H + B 4500-H + B D 1293-12, -18
Selenium Hydride-Atomic Absorption 3114 B 3114 B 3114 B 3114 B-09 D 3859-08 A, -15 A
Atomic Absorption; Furnace 3113 B 3113 B 3113 B 3113 B-04, B-10 D 3859-08 B, -15 B
Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.2? 2
Silica Colorimetric D859-05, 10, 16
Molybdosilicate 4500-SiO 2 C 4500-SiO 2 C 4500-SiO 2 C
Heteropoly blue 4500-SiO 2 D 4500-SiO 2 D 4500-SiO 2 D
Automated for Molybdate-reactive Silica 4500-SiO 2 E 4500-SiO 2 E 4500-SiO 2 E
Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.2? 2
Inductively Coupled Plasma 3120 B 3120 B 3120 B
Sodium Atomic Absorption; Direct Aspiration 3111 B 3111 B 3111 B
Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.2? 2
Ion Chromatography D 6919-09, -17
Temperature Thermometric 2550 2550 2550 2550-10



[top] page 5784 page 5785page 5786page 5787


[top] 
Contaminant Methodology EPA method SM 21st edition? 1 SM 22nd edition, 28 SM 23rd edition, 49 SM 24th edition? 66 SM online? 3 ASTM? 4 Other
Benzene Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3, 9 524.4. 29
Carbon tetrachloride Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3, 9 524.4. 29
Chlorobenzene Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3, 9 524.4. 29
1,2-Dichlorobenzene Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3, 9 524.4. 29
1,4-Dichlorobenzene Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3, 9 524.4. 29
1,2-Dichloroethane Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3, 9 524.4. 29
cis-Dichloroethylene Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3, 9 524.4. 29
trans-Dichloroethylene Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3, 9 524.4. 29
Dichloromethane Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3, 9 524.4. 29
1,2-Dichloropropane Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3, 9 524.4. 29
Ethylbenzene Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3, 9 524.4. 29
Styrene Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3, 9 524.4? 29
Tetrachloroethylene Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3, 9 524.4. 29
1,1,1-Trichloroethane Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3, 9 524.4. 29
Trichloroethylene Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3, 9 524.4. 29
Toluene Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3, 9 524.4. 29
1,2,4-Trichlorobenzene Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3, 9 524.4. 29
1,1-Dichloroethylene Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3, 9 524.4? 29
1,1,2-Trichlorethane Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3, 9 524.4. 29
Vinyl chloride Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3, 9 524.4. 29
Xylenes (total) Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3, 9 524.4. 29
2,4-D Gas Chromatography/Electron Capture Detection (GC/ECD) 6640 B 6640 B 6640 B-01, B-06 D 5317-20
2,4,5-TP (Silvex) Gas Chromatography/Electron Capture Detection (GC/ECD) 6640 B 6640 B 6640 B-01, B-06 D 5317-20
Alachlor Solid Phase Extraction/Gas Chromatography/Mass Spectrometry (GC/MS) 525.3. 24
Atrazine Liquid Chromatography Electrospray Ionization Tandem Mass Spectrometry (LC/ESI-MS/MS) 536. 25
Solid Phase Extraction/Gas Chromatography/Mass Spectrometry (GC/MS) 525.3, 24 523. 26
Benzo(a)pyrene Solid Phase Extraction/Gas Chromatography/Mass Spectrometry (GC/MS) 525.3. 24
Carbofuran High-performance liquid chromatography (HPLC) with post-column derivatization and fluorescence detection 6610 B 6610 B 6610 B-04
Liquid Chromatography/Mass Spectrometry ME 531. 58
Chlordane Solid Phase Extraction/Gas Chromatography/Mass Spectrometry (GC/MS) 525.3. 24
Dalapon Ion Chromatography Electrospray Ionization Tandem Mass Spectrometry (IC-ESI-MS/MS) 557. 14
Gas Chromatography/Electron Capture Detection (GC/ECD) 6640 B 6640 B 6640 B-01, B-06
Di(2-ethylhexyl)adipate Solid Phase Extraction/Gas Chromatography/Mass Spectrometry (GC/MS) 525.3. 24
Di(2-ethylhexyl)phthalate Solid Phase Extraction/Gas Chromatography/Mass Spectrometry (GC/MS) 525.3. 24
Dibromochloropropane (DBCP) Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3. 9
Dinoseb Gas Chromatography/Electron Capture Detection (GC/ECD) 6640 B 6640 B 6640 B-01, B-06
Endrin Solid Phase Extraction/Gas Chromatography/Mass Spectrometry (GC/MS) 525.3. 24
Ethyl dibromide (EDB) Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3. 9
Glyphosate High-Performance Liquid Chromatography (HPLC) with Post-Column Derivatization and Fluorescence Detection 6651 B 6651 B 6651 B-00, B-05
Heptachlor Solid Phase Extraction/Gas Chromatography/Mass Spectrometry (GC/MS) 525.3. 24
Heptachlor Epoxide Solid Phase Extraction/Gas Chromatography/Mass Spectrometry (GC/MS) 525.3. 24
Hexachlorobenzene Solid Phase Extraction/Gas Chromatography/Mass Spectrometry (GC/MS) 525.3. 24
Hexachlorocyclo-pentadiene Solid Phase Extraction/Gas Chromatography/Mass Spectrometry (GC/MS) 525.3. 24
Lindane Solid Phase Extraction/Gas Chromatography/Mass Spectrometry (GC/MS) 525.3. 24
Methoxychlor Solid Phase Extraction/Gas Chromatography/Mass Spectrometry (GC/MS) 525.3. 24
Oxamyl High-performance liquid chromatography (HPLC) with post-column derivatization and fluorescence detection 6610 B 6610 B 6610 B-04
Liquid Chromatography/Mass Spectrometry ME 531. 58
PCBs (as Aroclors) Solid Phase Extraction/Gas Chromatography/Mass Spectrometry (GC/MS) 525.3. 24
Pentachlorophenol Gas Chromatography/Electron Capture Detection (GC/ECD) 6640 B 6640 B 6640 B-01, B-06 D 5317-20
Solid Phase Extraction/Gas Chromatography/Mass Spectrometry (GC/MS) 525.3. 24
Picloram Gas Chromatography/Electron Capture Detection (GC/ECD) 6640 B 6640 B 6640 B-01, B-06 D 5317-20
Simazine Liquid Chromatography Electrospray Ionization Tandem Mass Spectrometry (LC/ESI-MS/MS) 536. 25
Solid Phase Extraction/Gas Chromatography/Mass Spectrometry (GC/MS) 525.3, 24 523. 26
Toxaphene Solid Phase Extraction/Gas Chromatography/Mass Spectrometry (GC/MS) 525.3. 24
Total Trihalomethanes Purge &Trap/Gas Chromatography/Mass Spectrometry 524.3, 9 524.4. 29


page 5788


[top] 
Contaminant Methodology EPA method SM 21st edition? 1 SM 22nd edition, 28 SM 23rd edition, 49 SM 24th edition? 66 ASTM? 4 SM online? 3
Naturally Occurring:
Gross alpha and beta Evaporation 900.0, Rev. 1.0? 50 7110 B 7110 B
Liquid Scintillation 7110 D D 7283-17 7110 D-17.
Gross alpha Coprecipitation 7110 C 7110 C
Radium 226 Radon emanation 903.1, Rev. 1.0? 53 7500-Ra C 7500-Ra C D 3454-05, -18, D 3454-21
Radiochemical 903.0, Rev. 1.0? 54 7500-Ra B 7500-Ra B D 2460-07
Gamma Spectrometry 7500-Ra E 7500-Ra E-07.
Radium 228 Radiochemical 904.0, Rev. 1.0? 62 7500-Ra D 7500-Ra D
Gamma Spectrometry 7500-Ra E 7500-Ra E-07.
Uranium Radiochemical 7500-U B 7500-U B
ICP-MS 3125 D 5673-05, 10, 16
Alpha spectrometry 7500-U C 7500-U C D 3972-09
Laser Phosphorimetry D 5174-07
Alpha Liquid Scintillation Spectrometry D 6239-09
Man-Made:
Radioactive Cesium Radiochemical 7500-Cs B 7500-Cs B
Gamma Ray Spectrometry 7120 7120 D 3649-06
Radioactive Iodine Radiochemical 7500-I B, 7500-I C, 7500-I D 7500-I B, 7500-I C, 7500-I D D 3649-06
Gamma Ray Spectrometry 7120 7120 D 4785-08, -20
Radioactive Strontium 89, 90 Radiochemical 7500-Sr B 7500-Sr B
Tritium Liquid Scintillation 7500- 3 H B 7500- 3 H B D 4107-08, -20
Gamma Emitters Gamma Ray Spectrometry 7120, 7500-Cs B, 7500-I B 7120, 7500-Cs B, 7500-I B D 3649-06, D 4785-08, -20


Organism Methodology SM 21st edition? 1 SM 22nd edition? 28 SM 23rd edition? 49 SM 24th edition? 66 SM online? 3 Other
Total Coliform Total Coliform Fermentation Technique 9221 A, B, C 9221 A, B, C 9221 A, B, C 9221 A, B, C 9221 A, B, C-06
Total Coliform Membrane Filter Technique 9222 A, B, C 9222 A, B, C 9222 A, B, C
ONPG-MUG Test 9223 9223 B 9223 B 9223 B 9223 B-04
Fecal Coliforms Fecal Coliform Procedure 9221 E 9221 E 9221 E 9221 E 9221 E-06
Fecal Coliform Filter Procedure 9222 D 9222 D 9222 D 9222 D 9222 D-06
Heterotrophic bacteria Pour Plate Method 9215 B 9215 B 9215 B 9215 B-04
Turbidity Nephelometric Method 2130 B 2130 B 2130 B 2130 B Hach Method 8195, Rev. 3.0. 52
Laser Nephelometry (on-line) Mitchell M5271, 10 Mitchell M5331, Rev. 1.2, 42 Lovibond PTV 6000. 46
LED Nephelometry (on-line) Mitchell M5331, 11 Mitchell M5331, Rev. 1.2, 42 Lovibond PTV 2000, 45 Yokogawa 820. 68
LED Nephelometry (on-line) AMI Turbiwell, 15 Lovibond PTV 1000. 44
LED Nephelometry (portable) Orion AQ4500, 12 Lovibond TB 3500, 64 Lovibond TB 5000. 65
Laser Nephelometry (portable) Lovibond TB 6000. 63
360° Nephelometry Hach Method 10258, Rev. 1.0, 39 Hach Method 10258, Rev. 2.0. 51


[top] page 5789

Residual Methodology EPA methods SM 21st edition? 1 SM 22nd edition, 28 SM 23rd edition, 49 SM 24th edition? 66 ASTM? 4 Other
Free Chlorine Amperometric Titration 4500-Cl D 4500-Cl D D 1253-08, -14
DPD Ferrous Titrimetric 4500-Cl F 4500-Cl F
DPD Colorimetric 4500-Cl G 4500-Cl G Hach Method 10260. 31
Indophenol Colorimetric Hach Method 10241. 34
Syringaldazine (FACTS) 4500-Cl H 4500-Cl H
On-line Chlorine Analyzer EPA 334.0. 16
Amperometric Sensor ChloroSense, 17 ChloroSense, Rev. 1.1. 59
Total Chlorine Amperometric Titration 4500-Cl D 4500-Cl D D 1253-08, -14
Amperometric Titration (Low level measurement) 4500-Cl E 4500-Cl E
DPD Ferrous Titrimetric 4500-Cl F 4500-Cl F
DPD Colorimetric 4500-Cl G 4500-Cl G Hach Method 10260. 31
Indophenol Colorimetric 127. 55
Iodometric Electrode 4500-Cl I 4500-Cl I
On-line Chlorine Analyzer EPA 334.0. 16
Amperometric Sensor ChloroSense, 17 ChloroSense, Rev. 1.1. 59
Chlorine Dioxide Amperometric Titration 4500-ClO 2 C 4500-ClO 2 C
Amperometric Titration 4500-ClO 2 E 4500-ClO 2 E
Amperometric Sensor ChlordioX Plus, 32 ChlordioX Plus, Rev. 1.1. 60
Ozone Indigo Method 4500-O 3 B 4500-O 3 B

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Contaminant Methodology EPA method ASTM? 4 SM online? 3 SM 21st edition? 1 SM 22nd edition, 28 SM 23rd edition, 49 SM 24th Edition? 66 Other
TTHM P&T/GC/MS 524.3, 9 524.4. 29
HAA5 LLE (diazomethane)/GC/ECD 6251 B-07 6251 B 6251 B
Ion Chromatography Electrospray Ionization Tandem Mass Spectrometry (IC-ESI-MS/MS) 557. 14
Two-Dimensional Ion Chromatography (IC) with Suppressed Conductivity Detection Thermo Fisher 557.1. 47
Bromate Two-Dimensional Ion Chromatography (IC) 302.0 18
Ion Chromatography Electrospray Ionization Tandem Mass Spectrometry (IC-ESI-MS/MS) 557. 14
Chemically Suppressed Ion Chromatography D 6581-08 A
Electrolytically Suppressed Ion Chromatography D 6581-08 B
Chlorite Chemically Suppressed Ion Chromatography D 6581-08 A
Electrolytically Suppressed Ion Chromatography D 6581-08 B
Chlorite-daily monitoring as prescribed in 40 CFR 141.132(b)(2)(i)(A) Amperometric Titration 4500-ClO 2 E 4500-ClO 2 E
Amperometric Sensor ChlordioX Plus, 32 ChlordioX Plus, Rev. 1.1. 60


Residual Methodology SM 21 st edition? 1 SM 22 nd edition, 28 SM 23 rd edition, 49 SM 24 th edition? 66 ASTM? 4 Other
Free Chlorine Amperometric Titration 4500-Cl D 4500-Cl D D 1253-08, -14
DPD Ferrous Titrimetric 4500-Cl F 4500-Cl F
DPD Colorimetric 4500-Cl G 4500-Cl G Hach Method 10260. 31
Indophenol Colorimetric Hach Method 10241. 34
Syringaldazine (FACTS) 4500-Cl H 4500-Cl H
Amperometric Sensor ChloroSense, 17 ChloroSense, Rev. 1.1. 59
On-line Chlorine Analyzer EPA 334.0. 16
Combined Chlorine Amperometric Titration 4500-Cl D 4500-Cl D D 1253-08, -14.
DPD Ferrous Titrimetric 4500-Cl F 4500-Cl F
DPD Colorimetric 4500-Cl G 4500-Cl G Hach Method 10260. 31
Total Chlorine Amperometric Titration 4500-Cl D 4500-Cl D D 1253-08, -14
>Low level Amperometric Titration 4500-Cl E 4500-Cl E
DPD Ferrous Titrimetric 4500-Cl F 4500-Cl F
DPD Colorimetric 4500-Cl G 4500-Cl G Hach Method 10260. 31
Iodometric Electrode 4500-Cl I 4500-Cl I
Amperometric Sensor ChloroSense, 17 ChloroSense, Rev. 1.1. 59
On-line Chlorine Analyzer EPA 334.0. 16
Chlorine Dioxide Amperometric Method II 4500-ClO 2 E 4500-ClO 2 E
Amperometric Sensor ChlordioX Plus, 32 ChlordioX Plus, Rev. 1.1. 60

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[top] 
Parameter Methodology SM 21 st edition? 1 SM 22 nd edition? 28 SM 23 rd edition? 49 , SM 24 th edition? 66 SM online? 3 EPA Other
Total Organic Carbon (TOC) High Temperature Combustion 5310 B 5310 B 5310 B 415.3, Rev 1.2? 19
Persulfate-Ultraviolet or Heated Persulfate Oxidation 5310 C 5310 C 5310 C 415.3, Rev 1.2? 19 Hach Method 10267? 38 .
Wet Oxidation 5310 D 5310 D 415.3, Rev 1.2? 19
Ozone Oxidation Hach Method 10261? 37 .
Specific Ultraviolet Absorbance (SUVA) Calculation using DOC and UV 254 data 415.3, Rev 1.2? 19
Dissolved Organic Carbon (DOC) High Temperature Combustion 5310 B 5310 B 5310 B 415.3, Rev 1.2? 19
Persulfate-Ultraviolet or Heated Persulfate Oxidation 5310 C 5310 C 5310 C 415.3, Rev 1.2? 19
Wet Oxidation 5310 D 5310 D 415.3, Rev 1.2? 19
Ultraviolet absorption at 254 nm (UV 254 ) Spectrophotometry 5910 B 5910 B 5910 B 5910 B-11 415.3, Rev 1.2? 19


Organism Methodology SM 20 th edition? 6 SM 21 st edition? 1 SM 22 nd edition? 28 SM 23 rd edition? 49 , SM 24 th edition? 66 SM online? 3 Other
E. coli Colilert 9223 B 9223 B 9223 B 9223 B-97, B-04
Colisure 9223 B 9223 B 9223 B 9223 B-97, B-04
Colilert-18 9223 B 9223 B 9223 B 9223 B 9223 B-97, B-04
Readycult® Readycult®. 20
Colitag Modified Colitag TM ? 13 , Modified Colitag? TM , Version 2.0. 61
Chromocult® Chromocult®. 21
EC-MUG 9221 F 9221 F 9221 F-06
NA-MUG 9222 I
mColiBlue24 Test 9222 J
Tecta EC/TC? 33 ? 43
RAPID'E.coli 2? 56
Enterococci Multiple-Tube Technique 9230 B 9230 B-04
Membrane Filter Techniques 9230 C
Fluorogenic Substrate Enterococcus Test (using Enterolert) 9230 D
Coliphage Two-Step Enrichment Presence-Absence Procedure Fast Phage. 30

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[top] 
Organism Methodology category Method SM 20 th , 21 st editions? 1 ? 6 SM 22 nd edition? 28 SM 23 rd edition? 49 , SM 24 th edition? 66 SM online? 3
Total Coliforms Lactose Fermentation Methods Standard Total Coliform Fermentation Technique 9221 B.1, B.2 9221 B.1, B.2, B.3, B.4 9221 B.1, B.2-06.
Presence-Absence (P-A) Coliform Test 9221 D.1, D.2, D.3
Membrane Filtration Methods Standard Total Coliform Membrane Filter Procedure using Endo Media 9222 B, C
Simultaneous Detection of Total Coliforms and E. coli by Dual Chromogen Membrane Filter Procedure (using mColiBlue24 medium) 9222 J
Simultaneous Detection of Total Coliform Bacteria and Escherichia coli Using RAPID' E.coli (REC2) in Drinking Water? 56
Enzyme Substrate Methods Colilert® 9223 B 9223 B 9223 B-04.
Colisure® 9223 B 9223 B 9223 B-04.
Colilert-18 9223 B 9223 B 9223 B 9223 B-04.
Tecta EC/TC? 33 ? 43
Modified Colitag TM , Version 2.0? 61
Escherichia coli Escherichia coli Procedure (following Lactose Fermentation Methods) EC-MUG medium 9221 F.1 9221 F.1 9221 F.1-06.
Escherichia coli Partitioning Methods (following Membrane Filtration Methods) EC broth with MUG (EC-MUG) 9222 H
NA-MUG medium 9222 I
Simultaneous Detection of Total Coliforms and E. coli by Dual Chromogen Membrane Filter Procedure mColiBlue24 medium 9222 J
Membrane Filtration Method Simultaneous Detection of Total Coliform Bacteria and Escherichia coli Using RAPID' E.coli (REC2) in Drinking Water? 56
Enzyme Substrate Methods Colilert® 9223 B 9223 B 9223 B-04.
Colisure® 9223 B 9223 B 9223 B-04.
Colilert-18 9223 B 9223 B 9223 B 9223 B-04.
Tecta EC/TC? 33 ? 43
Modified Colitag TM , Version 2.0? 61


page 5793


[top] 
Contaminant Methodology EPA method ASTM? 4 SM 21 st edition? 1 SM 22 nd edition, 28 SM 23 rd edition, 49 SM 24 th edition? 66 SM online? 3
Aluminum Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.2? 2
Atomic Absorption; Direct 3111 D 3111 D
Atomic Absorption; Furnace 3113 B 3113 B 3113 B-04, B-10.
Inductively Coupled Plasma 3120 B 3120 B
Chloride Silver Nitrate Titration D 512-04 B, 12 B 4500-Cl - B 4500-Cl - B
Ion Chromatography D 4327-11, -17 4110 B 4110 B
Potentiometric Titration 4500-Cl - D 4500-Cl - D
Color Visual Comparison 2120 B 2120 B
Foaming Agents Methylene Blue Active Substances (MBAS) 5540 C 5540 C
Iron Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.2? 2
Atomic Absorption; Direct 3111 B 3111 B
Atomic Absorption; Furnace 3113 B 3113 B 3113 B-04, B-10
Inductively Coupled Plasma 3120 B 3120 B
Manganese Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.2? 2
Atomic Absorption; Direct 3111 B 3111 B
Atomic Absorption; Furnace 3113 B 3113 B 3113 B-04, B-10.
Inductively Coupled Plasma 3120 B 3120 B
Odor Threshold Odor Test 2150 B 2150 B
Silver Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.2? 2
Atomic Absorption; Direct 3111 B 3111 B
Atomic Absorption; Furnace 3113 B 3113 B 3113 B-04, B-10.
Inductively Coupled Plasma 3120 B 3120 B
Sulfate Ion Chromatography D 4327-11, -17 4110 B 4110 B
Gravimetric with ignition of residue 4500-SO 4 2 - C 4500-SO 4 2 - C 4500-SO 4 2 - C-97.
Gravimetric with drying of residue 4500-SO 4 2 - D 4500-SO 4 2 - D 4500-SO 4 2 - D-97.
Turbidimetric method D 516-07, 11, 16 4500-SO 4 2 - E 4500-SO 4 2 - E 4500-SO 4 2 - E-97.
Automated methylthymol blue method 4500-SO 4 2 - F 4500-SO 4 2 - F 4500-SO 4 2 - F-97.
Total Dissolved Solids Total Dissolved Solids Dried at 180 deg C 2540 C 2540 C
Zinc Axially viewed inductively coupled plasma-atomic emission spectrometry (AVICP-AES) 200.5, Revision 4.2? 2
Atomic Absorption; Direct Aspiration 3111 B 3111 B
Inductively Coupled Plasma 3120 B 3120 B
?* * * * * * *
1 ? Standard Methods for the Examination of Water and Wastewater, 21st edition (2005). Available from American Public Health Association, 800 I Street NW, Washington, DC 20001-3710.
2 ?EPA Method 200.5, Revision 4.2. "Determination of Trace Elements in Drinking Water by Axially Viewed Inductively Coupled Plasma-Atomic Emission Spectrometry." 2003. EPA/600/R-06/115. (Available at http://www.epa.gov/water-research/epa-drinking-water-research-methods .)
3 ?Standard Methods Online are available at http://www.standardmethods.org . The year in which each method was approved by the Standard Methods Committee is designated by the last two digits in the method number. The methods listed are the only online versions that may be used.
4 ?Available from ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959 or http://astm.org . The methods listed are the only alternative versions that may be used.
?* * * * * * *
6 ? Standard Methods for the Examination of Water and Wastewater, 20th edition (1998). Available from American Public Health Association, 800 I Street NW, Washington, DC 20001-3710.
7 ?Method ME355.01, Revision 1.0. "Determination of Cyanide in Drinking Water by GC/MS Headspace," May 26, 2009. Available at https://www.nemi.gov or from James Eaton, H & E Testing Laboratory, 221 State Street, Augusta, ME 04333. (207) 287-2727.
8 ?Systea Easy (1-Reagent). "Systea Easy (1-Reagent) Nitrate Method," February 4, 2009. Available at https://www.nemi.gov or from Systea Scientific, LLC., 900 Jorie Blvd., Suite 35, Oak Brook, IL 60523.
9 ?EPA Method 524.3, Version 1.0. "Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry," June 2009. EPA 815-B-09-009. Available at https://www.nemi.gov .
10 ?Mitchell Method M5271, Revision 1.1. "Determination of Turbidity by Laser Nephelometry," March 5, 2009. Available at https://www.nemi.gov or from Leck Mitchell, Ph.D., PE, 656 Independence Valley Dr., Grand Junction, CO 81507.
11 ?Mitchell Method M5331, Revision 1.1. "Determination of Turbidity by LED Nephelometry," March 5, 2009. Available at https://www.nemi.gov or from Leck Mitchell, Ph.D., PE, 656 Independence Valley Dr., Grand Junction, CO 81507.
12 ?Orion Method AQ4500, Revision 1.0. "Determination of Turbidity by LED Nephelometry," May 8, 2009. Available at https://www.nemi.gov or from Thermo Scientific, 166 Cummings Center, Beverly, MA 01915, http://www.thermo.com .
13 ?Modified Colitag TM Method. "Modified Colitag TM Test Method for the Simultaneous Detection of E. coli and other Total Coliforms in Water (ATP D05-0035)," August 28, 2009. Available at https://www.nemi.gov or from CPI International, 5580 Skylane Boulevard, Santa Rosa, CA 95403.
14 ?EPA Method 557. "Determination of Haloacetic Acids, Bromate, and Dalapon in Drinking Water by Ion Chromatography Electrospray Ionization Tandem Mass Spectrometry (IC-ESI-MS/MS)," September 2009. EPA 815-B-09-012. Available at https://www.nemi.gov .
15 ?AMI Turbiwell, "Continuous Measurement of Turbidity Using a SWAN AMI Turbiwell Turbidimeter," August 2009. Available at https://www.nemi.gov or from Markus Bernasconi, SWAN Analytische Instrumente AG, Studbachstrasse 13, CH-8340 Hinwil, Switzerland.
16 ?EPA Method 334.0. "Determination of Residual Chlorine in Drinking Water Using an On-line Chlorine Analyzer," September 2009. EPA 815-B-09-013. Available at https://www.nemi.gov .
17 ?ChloroSense. "Measurement of Free and Total Chlorine in Drinking Water by Palintest ChloroSense," August 2009. Available at https://www.nemi.gov or from Palintest Ltd, 1455 Jamike Avenue (Suite 100), Erlanger, KY 41018.
18 ?EPA Method 302.0. "Determination of Bromate in Drinking Water using Two-Dimensional Ion Chromatography with Suppressed Conductivity Detection," September 2009. EPA 815-B-09-014. Available at https://www.nemi.gov .
19 ?EPA 415.3, Revision 1.2. "Determination of Total Organic Carbon and Specific UV Absorbance at 254 nm in Source Water and Drinking Water," September 2009. EPA/600/R-09/122. Available at http://www.epa.gov/water-research/epa-drinking-water-research-methods .
20 ?Readycult® Method, "Readycult® Coliforms 100 Presence/Absence Test for Detection and Identification of Coliform Bacteria and Escherichia coli in Finished Waters," January, 2007. Version 1.1. Available from EMD Millipore (division of Merck KGaA, Darmstadt, Germany), 290 Concord Road, Billerica, MA 01821.
21 ?Chromocult® Method, "Chromocult® Coliform Agar Presence/Absence Membrane Filter Test Method for Detection and Identification of Coliform Bacteria and Escherichia coli in Finished Waters," November, 2000. Version 1.0. EMD Millipore (division of Merck KGaA, Darmstadt, Germany), 290 Concord Road, Billerica, MA 01821.
22 ?Hach Company. "Hach Company SPADNS 2 (Arsenite-Free) Fluoride Method 10225-Spectrophotometric Measurement of Fluoride in Water and Wastewater," January 2011. 5600 Lindbergh Drive, P.O. Box 389, Loveland, Colorado 80539.
23 ?Hach Company. "Hach Company TNTplus TM ?835/836 Nitrate Method 10206-Spectrophotometric Measurement of Nitrate in Water and Wastewater," January 2011. 5600 Lindbergh Drive, P.O. Box 389, Loveland, Colorado 80539.
24 ?EPA Method 525.3. "Determination of Semivolatile Organic Chemicals in Drinking Water by Solid Phase Extraction and Capillary Column Gas Chromatography/Mass Spectrometry (GC/MS)," February 2012. EPA/600/R-12/010. Available at http://www.epa.gov/water-research/epa-drinking-water-research-methods . page 5794
25 ?EPA Method 536. "Determination of Triazine Pesticides and their Degradates in Drinking Water by Liquid Chromatography Electrospray Ionization Tandem Mass Spectrometry (LC/ESI-MS/MS)," October 2007. EPA 815-B-07-002. Available at the National Service Center for Environmental Publications at https://www.epa.gov/nscep .
26 ?EPA Method 523. "Determination of Triazine Pesticides and their Degradates in Drinking Water by Gas Chromatography/Mass Spectrometry (GC/MS)," February 2011. EPA 815-R-11-002. Available at the National Service Center for Environmental Publications at https://www.epa.gov/nscep .
?* * * * * * *
28 ? Standard Methods for the Examination of Water and Wastewater, 22nd edition (2012). Available from American Public Health Association, 800 I Street NW, Washington, DC 20001-3710.
29 ?EPA Method 524.4, Version 1.0. "Measurement of Purgeable Organic Compounds in Water by Gas Chromatography/Mass Spectrometry using Nitrogen Purge Gas." May 2013. EPA 815-R-13-002. Available at the National Service Center for Environmental Publications at https://www.epa.gov/nscep .
30 ?Charm Sciences Inc. "Fast Phage Test Procedure. Presence/Absence for Coliphage in Ground Water with Same Day Positive Prediction". Version 009. November 2012. 659 Andover Street, Lawrence, MA 01843. Available at www.charmsciences.com .
31 ?Hach Company. "Hach Method 10260-Determination of Chlorinated Oxidants (Free and Total) in Water Using Disposable Planar Reagent-filled Cuvettes and Mesofluidic Channel Colorimetry," April 2013. 5600 Lindbergh Drive, P.O. Box 389, Loveland, CO 80539.
32 ?ChlordioX Plus. "Chlorine Dioxide and Chlorite in Drinking Water by Amperometry using Disposable Sensors," November 2013.
Available from Palintest Ltd, 1455 Jamike Avenue (Suite 100), Erlanger, KY 41018.
33 ?Tecta EC/TC. "Techta TM EC/TC Medium and Techta TM Instrument: A Presence/Absence Method for the Simultaneous Detection of Total Coliforms and Escherichia coli ( E. coli ) in Drinking Water," version 1.0, May 2014. Available from Pathogen Detection Systems, Inc., 382 King Street East, Kingston, Ontario, Canada, K7K 2Y2.
34 ?Hach Company. "Hach Method 10241-Spectrophotometric Measurement of Free Chlorine (Cl 2 ) in Drinking Water," November 2015. Revision 1.2. 5600 Lindbergh Drive, P.O. Box 389, Loveland, CO 80539.
35 ?Hach Company. "Hach Method 8026-Spectrophotometric Measurement of Copper in Finished Drinking Water," December 2015. Revision 1.2. 5600 Lindbergh Drive, P.O. Box 389, Loveland, CO 80539.
36 ?Hach Company. "Hach Method 10272-Spectrophotometric Measurement of Copper in Finished Drinking Water," December 2015. Revision 1.2. 5600 Lindbergh Drive, P.O. Box 389, Loveland, CO 80539.
37 ?Hach Company. "Hach Method 10261-Total Organic Carbon in Finished Drinking Water by Catalyzed Ozone Hydroxyl Radical Oxidation Infrared Analysis," December 2015. Revision 1.2. 5600 Lindbergh Drive, P.O. Box 389, Loveland, CO 80539.
38 ?Hach Company. "Hach Method 10267-Spectrophotometric Measurement of Total Organic Carbon (TOC) in Finished Drinking Water," December 2015. Revision 1.2. 5600 Lindbergh Drive, P.O. Box 389, Loveland, CO 80539.
39 ?Hach Company. "Hach Method 10258-Determination of Turbidity by 360° Nephelometry," January 2016. Revision 1.0. 5600 Lindbergh Drive, P.O. Box 389, Loveland, CO 80539.
40 ?Nitrate Elimination Company Inc. (NECi). "Method for Nitrate Reductase Nitrate-Nitrogen Analysis of Drinking Water," February 2016. Superior Enzymes Inc., 334 Hecla Street, Lake Linden, Michigan 49945.
41 ?Thermo Fisher. "Thermo Fisher Scientific Drinking Water Orthophosphate Method for Thermo Scientific Gallery Discrete Analyzer," February 2016. Revision 5. Thermo Fisher Scientific, Ratastie 2, 01620 Vantaa, Finland.
42 ?Mitchell Method M5331, Revision 1.2. "Determination of Turbidity by LED or Laser Nephelometry," February 2016. Available from Leck Mitchell, Ph.D., PE, 656 Independence Valley Dr., Grand Junction, CO 81507.
43 ?Tecta EC/TC. "Tecta TM EC/TC Medium and the Tecta TM Instrument: A Presence/Absence Method for the Simultaneous Detection of Total Coliforms and Escherichia coli ( E. coli ) in Drinking Water," version 2.0, March 2017. Available from Pathogen Detection Systems, Inc., 382 King Street East, Kingston, Ontario, Canada, K7K 2Y2.
44 ?Lovibond PTV 1000. "Continuous Measurement of Drinking Water Turbidity using a Lovibond PTV 1000 White Light LED Turbidimeter," December 2016. Revision 1.0. Available from Tintometer, Inc., 6456 Parkland Drive, Sarasota, FL 34243.
45 ?Lovibond PTV 2000. "Continuous Measurement of Drinking Water Turbidity Using a Lovibond PTV 2000 660-nm LED Turbidimeter," December 2016. Revision 1.0. Available from Tintometer, Inc., 6456 Parkland Drive, Sarasota, FL 34243.
46 ?Lovibond PTV 6000. "Continuous Measurement of Drinking Water Turbidity Using a Lovibond PTV 6000 Laser Turbidimeter," December 2016. Revision 1.0. Available from Tintometer, Inc., 6456 Parkland Drive, Sarasota, FL 34243.
47 ?Thermo Fisher. "Thermo Fisher method 557.1: Determination of Haloacetic Acids in Drinking Water using Two-Dimensional Ion Chromatography with Suppressed Conductivity Detection," January 2017. Version 1.0. Available from Thermo Fisher Scientific, 490 Lakeside Dr., Sunnyvale, CA 94085 ( Richard.jack@thermofisher.com ).
48 ?EPA Method 150.3. "Determination of pH in Drinking Water," February 2017. EPA 815-B-17-001. Available at the National Service Center for Environmental Publications at https://www.epa.gov/nscep .
49 ? Standard Methods for the Examination of Water and Wastewater, 23rd edition (2017). Available from American Public Health Association, 800 I Street NW, Washington, DC 20001-3710.
50 ?EPA Method 900.0, Rev. 1.0. "Determination of Gross Alpha and Gross Beta in Drinking Water," February 2018. EPA 815-B-18-002. Available at the National Service Center for Environmental Publications at https://www.epa.gov/nscep .
51 ?Hach Company. "Hach Method 10258-Determination of Turbidity by 360° Nephelometry." March 2018. Revision 2.0. 5600 Lindbergh Drive, P.O. Box 389, Loveland, CO 80539.
52 ?Hach Company. "Hach Method 8195-Determination of Turbidity by Nephelometry." March 2018. Revision 3.0. 5600 Lindbergh Drive, P.O. Box 389, Loveland, CO 80539.
53 ?EPA Method 903.1, Rev. 1.0. "Radium-226 in Drinking Water Radon Emanation Technique." January 2021. EPA 815-B-21-003. Available at the National Service Center for Environmental Publications at https://www.epa.gov/nscep .
54 ?EPA Method 903.0, Rev. 1.0. "Alpha-Emitting Radium Isotopes in Drinking Water." January 2021. EPA 815-B-21-002. Available at the National Service Center for Environmental Publications at https://www.epa.gov/nscep .
55 ?EPA Method 127. "Determination of Monochloramine Concentration in Drinking Water." January 2021. EPA 815-B-21-004. Available at the National Service Center for Environmental Publications at https://www.epa.gov/nscep .
56 ?Bio-Rad. "Simultaneous Detection of Total Coliform Bacteria and Escherichia coli using RAPID' E. coli 2 (REC2) in Drinking Water." May 2020. Bio-Rad Laboratories, 2000 Nobel Drive, Hercules, California 94547.
57 ?Method 1001, Rev. 1.1. "Lead in Drinking Water by Differential Pulse Anodic Stripping Voltammetry." May 2020. Palintest Ltd, 400 Corporate Circle, Suite J, Golden, CO 80401.
58 ?ME 531, Version 1.0. "Measurement of N-Methylcarbamoyloximes and N-Methylcarbamates in Drinking Water by LC-MS/MS. September 2019. Maine Health Environmental Testing Laboratory, 221 State Street, Augusta, ME 04330.
59 ?ChloroSense, Rev. 1.1. "Free and Total Chlorine in Drinking Water by Amperometry using Disposable Sensors." February 2020. Palintest Ltd, 400 Corporate Circle, Suite J, Golden, CO 80401.
60 ?ChlordioX Plus, Rev. 1.1. "Chlorine Dioxide and Chlorite in Drinking Water by Amperometry using Disposable Sensors." February 2020. Palintest Ltd, 400 Corporate Circle, Suite J, Golden, CO 80401.
61 ?Modified Colitag TM , Version 2.0. "Modified Colitag TM Test Method for the Simultaneous Determination of Total Coliforms and E. coli in Water." June 2020. Neogen Corporation, 620 Lesher Place, Lansing, MI 48912.
62 ?EPA Method 904.0, Rev. 1.0. "Radium-228 in Drinking Water." March 2022. EPA 815-B-22-003. Available at the National Service Center for Environmental Publications at https://www.epa.gov/nscep .
63 ?Lovibond TB 6000. "Measurement of Drinking Water Turbidity of a Captured Sample using a Lovibond Portable Laser Turbidimeter." May 2021. Revision 1.0. Available from Tintometer, Inc., 6456 Parkland Drive, Sarasota, FL 34243.
64 ?Lovibond TB 3500. "Measurement of Drinking Water Turbidity of a Captured Sample using a Lovibond White Light LED Portable Turbidimeter." May 2021. Revision 1.0. Available from Tintometer, Inc., 6456 Parkland Drive, Sarasota, FL 34243.
65 ?Lovibond TB 5000. "Measurement of Drinking Water Turbidity of a Captured Sample using a Lovibond 660-nm LED Portable Turbidimeter." May 2021. Revision 1.0. Available from Tintometer, Inc., 6456 Parkland Drive, Sarasota, FL 34243.
66 ? Standard Methods for the Examination of Water and Wastewater, 24th edition (2023). Available from American Public Health Association, 800 I Street NW, Washington, DC 20001-3710.
67 ?Hach Company. "Hach Method 10312-Spectrophotometric Measurement of Fluoride in Finished Drinking Water Aluminum-Chromeazurol S complex (AL-CAS) Using Planar Reagent-filled Cuvettes". August 2022. Revision 1.0. 5600 Lindbergh Drive, Loveland, Colorado 80539.
68 ?Yokogawa Electric Corporation. "Yokogawa Method 820-Measurement of Turbidity in Drinking Water by Right Angle Scattered Light Turbidity Analyzer". November 2022. Revision 1.0. 2-9-32 Nakamachi, Musashino-shi, Tokyo, Japan 180-8750.


[FR Doc. 2024-01530 Filed 1-29-24; 8:45 am]

BILLING CODE 6560-50-P