Analytical Methods Approved for Drinking Water Compliance Monitoring of Organic Contaminants Analysis for the following organic contaminants shall be conducted in accordance with the methods in the following table, or their equivalent as determined by EPA. The methods and monitoring requirements for these contaminants are specified in 40 CFR 141.24. Additional methods are listed in Appendix A to Subpart C of Part 141. The CFR is the legal reference for approved methods and takes precedence over this table. The table should accurately reflect the analytical methods information published in 40 CFR 141. Organic Contaminants: 1,1,1-Trich oroethane Method Organization Reference Title Date EPA Publication Number Source of Method 502.2, Rev. 2.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Method Index 524.2, Rev. 4.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 524.3 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry June 2009 EPA 815-B-09-009 EPA 815-B-09-009 524.4 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry using Nitrogen Purge Gas May 2013 EPA 815-R-13-002 EPA 815-R-13-002 551.1, Rev. 1.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index oEPA United States Environmental Protection Agency Office of Water (MS - 4606 M) EPA 815-B-24-003 January 2024 ------- Page 2 of 36 1,1,2-Trichloroethane Method Organization Reference Title Date EPA Publication Number Source of Method 502.2, Rev. 2.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Method Index 524.2, Rev. 4.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 524.3 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry June 2009 EPA 815-B-09-009 EPA 815-B-09-009 524.4 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry using Nitrogen Purge Gas May 2013 EPA 815-R-13-002 EPA 815-R-13-002 551.1, Rev. 1.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 1,1-Dichloroethylene Method Organization Reference Title Date EPA Publication Number Source of Method 502.2, Rev. 2.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Method Index 524.2, Rev. 4.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 524.3 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry June 2009 EPA 815-B-09-009 EPA 815-B-09-009 ------- Page 3 of 36 524.4 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry using Nitrogen Purge Gas May 2013 EPA 815-R-13-002 EPA 815-R-13-002 1,2-Dichlorobenzene Method Organization Reference Title Date EPA Publication Number Source of Method 502.2, Rev. 2.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Method Index 524.2, Rev. 4.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 524.3 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry June 2009 EPA 815-B-09-009 EPA 815-B-09-009 524.4 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry using Nitrogen Purge Gas May 2013 EPA 815-R-13-002 EPA 815-R-13-002 1,2,4-Trich orobenzene Method Organization Reference Title Date EPA Publication Number Source of Method 502.2, Rev. 2.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Method Index 524.2, Rev. 4.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 524.3 EPA Measurement of Purgeable Organic Compounds in Water by June 2009 EPA 815-B-09-009 EPA 815-B-09-009 ------- Page 4 of 36 Capillary Column Gas Chromatography/Mass Spectrometry 524.4 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry using Nitrogen Purge Gas May 2013 EPA 815-R-13-002 EPA 815-R-13-002 1,2-Dichloroethane Method Organization Reference Title Date EPA Publication Number Source of Method 502.2, Rev. 2.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Method Index 524.2, Rev. 4.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 524.3 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry June 2009 EPA 815-B-09-009 EPA 815-B-09-009 524.4 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry using Nitrogen Purge Gas May 2013 EPA 815-R-13-002 EPA 815-R-13-002 1,2-Dichloropropane Method Organization Reference Title Date EPA Publication Number Source of Method 502.2, Rev. 2.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Method Index 524.2, Rev. 4.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index ------- Page 5 of 36 524.3 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry June 2009 EPA 815-B-09-009 EPA 815-B-09-009 524.4 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry using Nitrogen Purge Gas May 2013 EPA 815-R-13-002 EPA 815-R-13-002 1,4-Dichlorobenzene Method Organization Reference Title Date EPA Publication Number Source of Method 502.2, Rev. EPA In Methods for the Determination August 1995 E PA/600/R-95-131 National Environmental Method Index 2.1 of Organic Compounds in Drinking Water - Supplement III 524.2, Rev. EPA In Methods for the Determination August 1995 E PA/600/R-95-131 National Environmental Methods Index 4.1 of Organic Compounds in Drinking Water - Supplement III 524.3 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry June 2009 EPA 815-B-09-009 EPA 815-B-09-009 524.4 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry using Nitrogen Purge Gas May 2013 EPA 815-R-13-002 EPA 815-R-13-002 2,3,7,8-TCDD (Dioxin) Method Organization Reference Title Date EPA Publication Number Source of Method 1613 EPA Tetra- through Octa-Chlorinated Dioxins and Furans by Isotope- Dilution HRGC/HRMS October 1994 E PA/82 l-B-94-005 E PA/82 l-B-94-005 ------- Page 6 of 36 2,4,5-TP (Silvex) Accurate determination of the chlorinated esters requires hydrolysis of the sample as described in the approved methods. Method Organization Reference Title Date EPA Publication Number Source of Method D5317-93 ASTM International Standard Test Method for Determination of Chlorinated Organic Acid Compounds in Water by Gas Chromatography with an Electron Capture Detector 1993 ASTM International D5317-98 ASTM International Standard Test Method for Determination of Chlorinated Organic Acid Compounds in Water by Gas Chromatography with an Electron Capture Detector 1998 ASTM International D5317-20 ASTM International Standard Test Method for Determination of Chlorinated Organic Acid Compounds in Water by Gas Chromatography with an Electron Capture Detector 2020 ASTM International 515.1, Rev. 4.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water December 1988, Revised July 1991 EPA/600/4-88-039 EPA/600/4-88-039 515.2, Rev. 1.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 515.3, Rev. 1.0 EPA In Methods for the Determination of Organic and Inorganic Compounds in Drinking Water, Volume 1 August 2000 EPA 815-R-00-014 National Environmental Methods Index 515.4, Rev. 1.0 EPA Determination of Chlorinated Acids in Drinking Water by Liquid-Liquid Microextraction, Derivatization, and Fast Gas Chromatography with Electron Capture Detection April 2000 EPA/815/B-00/001 EPA/815/B-00/001 555, Rev. 1.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement II August 1992 EPA/600/R-92/129 National Environmental Methods Index ------- Page 7 of 36 6640 B Standard Methods Standard Methods for the Examination of Water and Wastewater, 21st Edition 2005 Standard Methods 6640 B Standard Methods Standard Methods for the Examination of Water and Wastewater, 22nd Edition 2012 Standard Methods 6640 B Standard Methods Standard Methods for the Examination of Water and Wastewater, 23rd Edition 2017 Standard Methods 6640 B Standard Methods Standard Methods for the Examination of Water and Wastewater, 24th Edition 2023 Standard Methods 6640 B-01 Standard Methods Online Online version. Approval year is designated by the last 2 digits. Only online versions cited in the regulations or in Appendix A to Subpart C of Part 141 are approved. 2001 Standard Methods 6640 B-06 Standard Methods Online Online version. Approval year is designated by the last 2 digits. Only online versions cited in the regulations or in Appendix A to Subpart C of Part 141 are approved. 2006 Standard Methods 2,4-D (as acid, salts and esters) Accurate determination of the chlorinated esters requires hydrolysis of the sample as described in the approved methods. Method Organization Reference Title Date EPA Publication Number Source of Method D5317-93 ASTM International Standard Test Method for Determination of Chlorinated Organic Acid Compounds in Water by Gas Chromatography with an Electron Capture Detector 1993 ASTM International D5317-98 ASTM International Standard Test Method for Determination of Chlorinated Organic Acid Compounds in Water by Gas Chromatography with an Electron Capture Detector 1998 ASTM International ------- Page 8 of 36 D5317-20 ASTM International Standard Test Method for Determination of Chlorinated Organic Acid Compounds in Water by Gas Chromatography with an Electron Capture Detector 2020 ASTM International 515.1, Rev. 4.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water December 1988, Revised July 1991 EPA/600/4-88-039 EPA/600/4-88-039 515.2, Rev. 1.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 515.3, Rev. 1.0 EPA In Methods for the Determination of Organic and Inorganic Compounds in Drinking Water, Volume 1 August 2000 EPA 815-R-00-014 National Environmental Methods Index 515.4, Rev. 1.0 EPA Determination of Chlorinated Acids in Drinking Water by Liquid-Liquid Microextraction, Derivatization, and Fast Gas Chromatography with Electron Capture Detection April 2000 EPA/815/B-00/001 EPA/815/B-00/001 555, Rev. 1.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement II August 1992 EPA/600/R-92/129 National Environmental Methods Index 6640 B Standard Methods Standard Methods for the Examination of Water and Wastewater, 21st Edition 2005 Standard Methods 6640 B Standard Methods Standard Methods for the Examination of Water and Wastewater, 22nd Edition 2012 Standard Methods 6640 B Standard Methods Standard Methods for the Examination of Water and Wastewater, 23rd Edition 2017 Standard Methods 6640 B Standard Methods Standard Methods for the Examination of Water and Wastewater, 24th Edition 2023 Standard Methods 6640 B-01 Standard Methods Online Online version. Approval year is designated by the last 2 digits. Only online versions cited in the regulations or in Appendix A to Subpart C of Part 141 are approved. 2001 Standard Methods ------- Page 9 of 36 6640 B-06 Standard Online version. Approval year is 2006 Standard Methods Methods Online designated by the last 2 digits. Only online versions cited in the regulations or in Appendix A to Subpart C of Part 141 are approved. Alachlor Note regarding EPA Methods 505, 507 and 508.1: Substitution of the detector specified in Methods 505, 507, or 508.1 for the purpose of achieving lower detection limits is allowed as follows - either an electron capture or nitrogen phosphorus detector may be used provided all regulatory requirements and quality control criteria are met. Method Organization Reference Title Date EPA Publication Number Source of Method 505, Rev. 2.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 507, Rev. 2.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 508.1, Rev. 2.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 525.2, Rev. 2.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 525.3 EPA Determination ofSemivolatile 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 EPA/600/R-12/010 551.1, Rev. 1.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index Atrazine Note regarding EPA Methods 505, 507 and 508.1: Substitution of the detector specified in Methods 505, 507, or 508.1 for the purpose of achieving lower detection limits is allowed as follows - either an electron capture or nitrogen phosphorus detector may be used provided all regulatory requirements and quality control criterial are met. ------- Page 10 of 36 Note regarding Syngenta Method AG-625: This method may not be used for the analysis of atrazine in any system where chlorine dioxide is used for drinking water treatment. In samples from all other systems, any result for atrazine that is greater than one-half the MCL (i.e. greater than 1.5 ng/L) must be confirmed using another approved method for atrazine and should use additional volume of the original sample collected for compliance monitoring. In instances where a result from Syngenta Method AG-625 triggers such confirmatory testing, the con :irmatory result is to De used to determine compliance. Method Organization Reference Title Date EPA Publication Number Source of Method 505, Rev. EPA In Methods for the Determination August 1995 E PA/600/R-95-131 National Environmental Methods Index 2.1 of Organic Compounds in Drinking Water - Supplement III 507, Rev. EPA In Methods for the Determination August 1995 E PA/600/R-95-131 National Environmental Methods Index 2.1 of Organic Compounds in Drinking Water - Supplement III 508.1, Rev. EPA In Methods for the Determination August 1995 E PA/600/R-95-131 National Environmental Methods Index 2.0 of Organic Compounds in Drinking Water - Supplement III 525.2, Rev. EPA In Methods for the Determination August 1995 E PA/600/R-95-131 National Environmental Methods Index 2.0 of Organic Compounds in Drinking Water - Supplement III 525.3 EPA Determination ofSemivolatile 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 EPA/600/R-12/010 551.1, Rev. EPA In Methods for the Determination August 1995 E PA/600/R-95-131 National Environmental Methods Index 1.0 of Organic Compounds in Drinking Water - Supplement III 536 EPA Determination ofTriazine 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 EPA 815-B-07-002 523 EPA Determination ofTriazine Pesticides and their Degradates in Drinking Water by Gas Chromatography/Mass Spectrometry (GC/MS) February 2011 EPA 815-R-11-002 EPA 815-R-11-002 Syngenta Syngenta Crop Atrazine in Drinking Water by February National Environmental Methods Index AG-625 Protection, Inc. Immunoassay 2001 ------- Page 11 of 36 See note under the "Atrazine" header above. Benzene Method Organization Reference Title Date EPA Publication Number Source of Method 502.2, Rev. 2.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Method Index 524.2, Rev. 4.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 524.3 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry June 2009 EPA 815-B-09-009 EPA 815-B-09-009 524.4 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry using Nitrogen Purge Gas May 2013 EPA 815-R-13-002 EPA 815-R-13-002 Benzo|a]pyrene Method Organization Reference Title Date EPA Publication Number Source of Method 525.2, Rev. 2.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 525.3 EPA Determination ofSemivolatile 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 EPA/600/R-12/010 550 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement 1 July 1990 EPA/600/4-90/020 National Environmental Methods Index ------- Page 12 of 36 550.1 EPA In Methods for the Determination July 1990 EPA/600/4-90/020 National Environmental Methods Index of Organic Compounds in Drinking Water - Supplement 1 Carbofuran Method Organization Reference Title Date EPA Publication Number Source of Method 531.1, Rev. 3.1 EPA In Methods for the Determination of Organic Compound in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 531.2, Rev. 1.0 EPA Measurement of N-Methyl- carbamoyloximes and N- Methylcarbamates in Water by Direct Aqueous Injection HPLC with Post Column Derivatization September 2001 EPA 815/B/01/002 EPA 815/B/01/002 ME 531, v. 1.0 Maine HETL Measurement of N-Methyl- carbamoyloximes and N-Methyl- carbamates in Drinking Water by LC-MS/MS September 2019 ME 531. v. 1.0 6610 B Standard Methods Standard Methods for the Examination of Water and Wastewater, 21st Edition 2005 Standard Methods 6610 B Standard Methods Standard Methods for the Examination of Water and Wastewater, 22nd Edition 2012 Standard Methods 6610 B Standard Methods Standard Methods for the Examination of Water and Wastewater, 23rd Edition 2017 Standard Methods 6610 B Standard Methods Standard Methods for the Examination of Water and Wastewater, 24th Edition 2023 Standard Methods 6610 B-04 Standard Methods Online Online version. Approval year is designated by the last 2 digits. Only online versions cited in the regulations or in Appendix A to Subpart C of Part 141 are approved. 2004 Standard Methods ------- Page 13 of 36 Carbon Tetrachloride Method Organization Reference Title Date EPA Publication Number Source of Method 502.2, Rev. 2.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Method Index 524.2, Rev. 4.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 524.3 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry June 2009 EPA 815-B-09-009 EPA 815-B-09-009 524.4 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry using Nitrogen Purge Gas May 2013 EPA 815-R-13-002 EPA 815-R-13-002 551.1, Rev. 1.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index Chlordane Method Organization Reference Title Date EPA Publication Number Source of Method 505, Rev. 2.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 508, Rev. 3.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 508.1, Rev. 2.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 525.2, Rev. 2.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index ------- Page 14 of 36 525.3 EPA Determination ofSemivolatile 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 EPA/600/R-12/010 Chlorobenzene Method Organization Reference Title Date EPA Publication Number Source of Method 502.2, Rev. 2.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Method Index 524.2, Rev. 4.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 524.3 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry June 2009 EPA 815-B-09-009 EPA 815-B-09-009 524.4 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry using Nitrogen Purge Gas May 2013 EPA 815-R-13-002 EPA 815-R-13-002 cis-Dichloroethylene Method Organization Reference Title Date EPA Publication Number Source of Method 502.2, Rev. 2.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Method Index 524.2, Rev. 4.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 524.3 EPA Measurement of Purgeable Organic Compounds in Water by June 2009 EPA 815-B-09-009 EPA 815-B-09-009 ------- Page 15 of 36 Capillary Column Gas Chromatography/Mass Spectrometry 524.4 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry using Nitrogen Purge Gas May 2013 EPA 815-R-13-002 EPA 815-R-13-002 Dalapon Method Organization Reference Title Date EPA Publication Number Source of Method 515.1, Rev. 4.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water December 1988, Revised July 1991 EPA/600/4-88-039 EPA/600/4-88-039 515.3, Rev. 1.0 EPA In Methods for the Determination of Organic and Inorganic Compounds in Drinking Water, Volume 1 August 2000 EPA 815-R-00-014 National Environmental Methods Index 515.4, Rev. 1.0 EPA Determination of Chlorinated Acids in Drinking Water by Liquid-Liquid Microextraction, Derivatization, and Fast Gas Chromatography with Electron Capture Detection April 2000 EPA/815/B-00/001 EPA/815/B-00/001 552.1, Rev. 1.0 EPA In Methods for the Determination of Organic Compounds in Drinking 1/l/ater-Supplement II August 1992 E PA/600/R-92-129 National Environmental Methods Index 552.2, Rev. 1.0 EPA In Methods for the Determination of Organic Compounds in Drinking 1/l/ater-Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 552.3, Rev. 1.0 EPA Determination of Haloacetic Acids and Dalapon in Drinking Water by Liquid-Liquid Microextraction, Derivatization, and Gas Chromatography with Electron Capture Detection July 2003 EPA 815-B-03-002 EPA 815-B-03-002 557 EPA Determination of Haloacetic Acids, Bromate, and Dalapon in Drinking Water by Ion Chromatography September 2009 EPA 815-B-09-012 EPA 815-B-09-012 ------- Page 16 of 36 Electrospray Ionization Tandem Mass Spectrometry (IC-ESI- MS/MS) 6640 B Standard Methods Standard Methods for the Examination of Water and Wastewater, 21st Edition 2005 Standard Methods 6640 B Standard Methods Standard Methods for the Examination of Water and Wastewater, 22nd Edition 2012 Standard Methods 6640 B Standard Methods Standard Methods for the Examination of Water and Wastewater, 23rd Edition 2017 Standard Methods 6640 B Standard Methods Standard Methods for the Examination of Water and Wastewater, 24th Edition 2023 Standard Methods 6640 B-01 Standard Methods Online Online version. Approval year is designated by the last 2 digits. Only online versions cited in the regulations or in Appendix A to Subpart C of Part 141 are approved. 2001 Standard Methods 6640 B-06 Standard Methods Online Online version. Approval year is designated by the last 2 digits. Only online versions cited in the regulations or in Appendix A to Subpart C of Part 141 are approved. 2006 Standard Methods Di(2-ethylhexyl)adipate Method Organization Reference Title Date EPA Publication Number Source of Method 506, Rev. 1.1 EPA In Methods for the Determination of Organic Compounds in Drinking l/l/ater-Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 525.2, Rev. 2.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 525.3 EPA Determination ofSemivolatile Organic Chemicals in Drinking Water by Solid Phase Extraction February 2012 EPA/600/R-12/010 EPA/600/R-12/010 ------- Page 17 of 36 and Capillary Column Gas Chromatography/Mass Spectrometry (GC/MS) Di(2-ethylhexyl)phthalate Method Organization Reference Title Date EPA Publication Number Source of Method 506, Rev. 1.1 EPA In Methods for the Determination of Organic Compounds in Drinking 1/l/ater-Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 525.2, Rev. 2.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 525.3 EPA Determination ofSemivolatile 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 EPA/600/R-12/010 Dibromoch oropropane (DBCP) Method Organization Reference Title Date EPA Publication Number Source of Method 504.1, Rev. 1.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 524.3 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry June 2009 EPA 815-B-09-009 EPA 815-B-09-009 551.1, Rev. 1.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index Dichloromethane Method Organization Reference Title Date EPA Publication Number Source of Method ------- Page 18 of 36 502.2, Rev. 2.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Method Index 524.2, Rev. 4.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 524.3 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry June 2009 EPA 815-B-09-009 EPA 815-B-09-009 524.4 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry using Nitrogen Purge Gas May 2013 EPA 815-R-13-002 EPA 815-R-13-002 Dinoseb Accurate determination of the chlorinated esters requires hydrolysis of the sample as described in the approved methods. Method Organization Reference Title Date EPA Publication Number Source of Method 515.1, Rev. 4.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water December 1988, Revised July 1991 EPA/600/4-88-039 EPA/600/4-88-039 515.2, Rev. 1.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 515.3, Rev. 1.0 EPA In Methods for the Determination of Organic and Inorganic Compounds in Drinking Water, Volume 1 August 2000 EPA 815-R-00-014 National Environmental Methods Index 515.4, Rev. 1.0 EPA Determination of Chlorinated Acids in Drinking Water by Liquid-Liquid Microextraction, Derivatization, and Fast Gas Chromatography with Electron Capture Detection April 2000 EPA/815/B-00/001 EPA/815/B-00/001 555, Rev. 1.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement II August 1992 EPA/600/R-92/129 National Environmental Methods Index ------- Page 19 of 36 6640 B Standard Methods Standard Methods for the Examination of Water and Wastewater, 21st Edition 2005 Standard Methods 6640 B Standard Methods Standard Methods for the Examination of Water and Wastewater, 22nd Edition 2012 Standard Methods 6640 B Standard Methods Standard Methods for the Examination of Water and Wastewater, 23rd Edition 2017 Standard Methods 6640 B Standard Methods Standard Methods for the Examination of Water and Wastewater, 24th Edition 2023 Standard Methods 6640 B-01 Standard Methods Online Online version. Approval year is designated by the last 2 digits. Only online versions cited in the regulations or in Appendix A to Subpart C of Part 141 are approved. 2001 Standard Methods 6640 B-06 Standard Methods Online Online version. Approval year is designated by the last 2 digits. Only online versions cited in the regulations or in Appendix A to Subpart C of Part 141 are approved. 2006 Standard Methods Diquat Method Organization Reference Title Date EPA Publication Number Source of Method 549.2, Rev. 1.0 EPA In Methods for the Determination of Organic and Inorganic Compounds in Drinking Water, Volume 1 August 2000 EPA 815-R-00-014 National Environmental Methods Index Endothall Method Organization Reference Title Date EPA Publication Number Source of Method 548.1, Rev. 1.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water, Supplement II August 1992 EPA/600/R-92/129 National Environmental Methods Index ------- Page 20 of 36 Endrin Method Organization Reference Title Date EPA Publication Number Source of Method 505, Rev. 2.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 508, Rev. 3.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 508.1, Rev. 2.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 525.2, Rev. 2.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 525.3 EPA Determination ofSemivolatile 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 EPA/600/R-12/010 551.1, Rev. 1.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index Ethylbenzene Method Organization Reference Title Date EPA Publication Number Source of Method 502.2, Rev. 2.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Method Index 524.2, Rev. 4.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 524.3 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas June 2009 EPA 815-B-09-009 EPA 815-B-09-009 ------- Page 21 of 36 Chromatography/Mass Spectrometry 524.4 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry using Nitrogen Purge Gas May 2013 EPA 815-R-13-002 EPA 815-R-13-002 Ethylene Dibromide (EDB) Method Organization Reference Title Date EPA Publication Number Source of Method 504.1, Rev. 1.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 524.3 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry June 2009 EPA 815-B-09-009 EPA 815-B-09-009 551.1, Rev. 1.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index Glyphosate Method Organization Reference Title Date EPA Publication Number Source of Method 547 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement 1 July 1990 EPA/600/4-90/020 National Environmental Methods Index 6651 Standard Methods Standard Methods for the Examination of Water and Wastewater, 18th Edition 1992 Standard Methods 6651 Standard Methods Standard Methods for the Examination of Water and Wastewater, 19th Edition 1995 Standard Methods 6651 Standard Methods Standard Methods for the Examination of Water and Wastewater, 20th Edition 1998 Standard Methods ------- Page 22 of 36 6651 B Standard Methods Standard Methods for the Examination of Water and Wastewater, 21st Edition 2005 Standard Methods 6651 B Standard Methods Standard Methods for the Examination of Water and Wastewater, 22nd Edition 2012 Standard Methods 6651 B Standard Methods Standard Methods for the Examination of Water and Wastewater, 23rd Edition 2017 Standard Methods 6651 B Standard Methods Standard Methods for the Examination of Water and Wastewater, 24th Edition 2023 Standard Methods 6651 B-00 Standard Methods Online Online version. Approval year is designated by the last 2 digits. Only online versions cited in the regulations or in Appendix A to Subpart C of Part 141 are approved. 2000 Standard Methods 6651 B-05 Standard Methods Online Online version. Approval year is designated by the last 2 digits. Only online versions cited in the regulations or in Appendix A to Subpart C of Part 141 are approved. 2005 Standard Methods Heptachlor Method Organization Reference Title Date EPA Publication Number Source of Method 505, Rev. 2.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 508, Rev. 3.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 508.1, Rev. 2.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 525.2, Rev. 2.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index ------- Page 23 of 36 525.3 EPA Determination ofSemivolatile 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 EPA/600/R-12/010 551.1, Rev. 1.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index Heptachlor Epoxide Method Organization Reference Title Date EPA Publication Number Source of Method 505, Rev. 2.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 508, Rev. 3.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 508.1, Rev. 2.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 525.2, Rev. 2.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 525.3 EPA Determination ofSemivolatile 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 EPA/600/R-12/010 551.1, Rev. 1.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index Hexachlorobenzene Method Organization Reference Title Date EPA Publication Number Source of Method ------- Page 24 of 36 505, Rev. 2.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 508, Rev. 3.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 508.1, Rev. 2.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 525.2, Rev. 2.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 525.3 EPA Determination ofSemivolatile 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 EPA/600/R-12/010 551.1, Rev. 1.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index Hexachlorocyclopentadiene Method Organization Reference Title Date EPA Publication Number Source of Method 505, Rev. 2.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 508, Rev. 3.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 508.1, Rev. 2.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 525.2, Rev. 2.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 525.3 EPA Determination ofSemivolatile Organic Chemicals in Drinking Water by Solid Phase Extraction February 2012 EPA/600/R-12/010 EPA/600/R-12/010 ------- Page 25 of 36 and Capillary Column Gas Chromatography/Mass Spectrometry (GC/MS) 551.1, Rev. 1.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index Lindane Method Organization Reference Title Date EPA Publication Number Source of Method 505, Rev. 2.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 508, Rev. 3.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 508.1, Rev. 2.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 525.2, Rev. 2.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 525.3 EPA Determination ofSemivolatile 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 EPA/600/R-12/010 551.1, Rev. 1.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index VIethoxych or Method Organization Reference Title Date EPA Publication Number Source of Method 505, Rev. 2.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index ------- Page 26 of 36 508, Rev. 3.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 508.1, Rev. 2.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 525.2, Rev. 2.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 525.3 EPA 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 EPA/600/R-12/010 551.1, Rev. 1.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index Oxamyl Method Organization Reference Title Date EPA Publication Number Source of Method 531.1, Rev. 3.1 EPA In Methods for the Determination of Organic Compound in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 531.2, Rev. 1.0 EPA Measurement of N-Methyl- carbamoyloximes and N- Methylcarbamates in Water by Direct Aqueous Injection HPLC with Post Column Derivatization September 2001 EPA 815/B/01/002 EPA 815/B/01/002 ME 531, v. 1.0 Maine HETL Measurement of N-Methyl- carbamoyloximes and N-Methyl- carbamates in Drinking Water by LC-MS/MS September 2019 ME 531, v. 1.0 6610 B Standard Methods Standard Methods for the Examination of Water and Wastewater, 21st Edition 2005 Standard Methods 6610 B Standard Methods Standard Methods for the Examination of Water and Wastewater, 22nd Edition 2012 Standard Methods ------- Page 27 of 36 6610 B Standard Methods Standard Methods for the Examination of Water and Wastewater, 23rd Edition 2017 Standard Methods 6610 B Standard Methods Standard Methods for the Examination of Water and Wastewater, 24th Edition 2023 Standard Methods 6610 B-04 Standard Methods Online Online version. Approval year is designated by the last 2 digits. Only online versions cited in the regulations or in Appendix A to Subpart C of Part 141 are approved. 2004 Standard Methods PCBs (as Arochlors) PCBs are qualitatively identified as Aroclors and measured for compliance purposes as decachlorobiphenyl. Users of Method 505 may have more difficulty achieving the required detection levels than users of Methods 508.1, 525.2, 525.3 or 508. Method Organization Reference Title Date EPA Publication Number Source of Method 505, Rev. 2.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 508, Rev. 3.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 508.1, Rev. 2.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 525.2, Rev. 2.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 525.3 EPA Determination ofSemivolatile 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 EPA/600/R-12/010 PCBs (as decachlorobiphenyl) PCBs are only measured for compliance purposes as decachlorobiphenyl. ------- Page 28 of 36 Method Organization Reference Title Date EPA Publication Number Source of Method 508A, Rev. 1.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water December 1988, Revised July 1991 EPA/600/4-88-039 National Environmental Methods Index Pentachlorophenol Method Organization Reference Title Date EPA Publication Number Source of Method D5317-93 ASTM International Standard Test Method for Determination of Chlorinated Organic Acid Compounds in Water by Gas Chromatography with an Electron Capture Detector 1993 ASTM International D5317-98 ASTM International Standard Test Method for Determination of Chlorinated Organic Acid Compounds in Water by Gas Chromatography with an Electron Capture Detector 1998 ASTM International D5317-20 ASTM International Standard Test Method for Determination of Chlorinated Organic Acid Compounds in Water by Gas Chromatography with an Electron Capture Detector 2020 ASTM International 515.1, Rev. 4.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water December 1988, Revised July 1991 EPA/600/4-88-039 EPA/600/4-88-039 515.2, Rev. 1.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 515.3, Rev. 1.0 EPA In Methods for the Determination of Organic and Inorganic Compounds in Drinking Water, Volume 1 August 2000 EPA 815-R-00-014 National Environmental Methods Index 515.4, Rev. 1.0 EPA Determination of Chlorinated Acids in Drinking Water by Liquid-Liquid Microextraction, Derivatization, and Fast Gas Chromatography with Electron Capture Detection April 2000 EPA/815/B-00/001 EPA/815/B-00/001 ------- Page 29 of 36 525.2, Rev. 2.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 525.3 EPA Determination ofSemivolatile 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 EPA/600/R-12/010 555, Rev. 1.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement II August 1992 EPA/600/R-92/129 National Environmental Methods Index 6640 B Standard Methods Standard Methods for the Examination of Water and Wastewater, 21st Edition 2005 Standard Methods 6640 B Standard Methods Standard Methods for the Examination of Water and Wastewater, 22nd Edition 2012 Standard Methods 6640 B Standard Methods Standard Methods for the Examination of Water and Wastewater, 23rd Edition 2017 Standard Methods 6640 B Standard Methods Standard Methods for the Examination of Water and Wastewater, 24th Edition 2023 Standard Methods 6640 B-01 Standard Methods Online Online version. Approval year is designated by the last 2 digits. Only online versions cited in the regulations or in Appendix A to Subpart C of Part 141 are approved. 2001 Standard Methods 6640 B-06 Standard Methods Online Online version. Approval year is designated by the last 2 digits. Only online versions cited in the regulations or in Appendix A to Subpart C of Part 141 are approved. 2006 Standard Methods Picloram Method Organization Reference Title Date EPA Publication Source of Method Number ------- Page 30 of 36 D5317-93 ASTM International Standard Test Method for Determination of Chlorinated Organic Acid Compounds in Water by Gas Chromatography with an Electron Capture Detector 1993 ASTM International D5317-98 ASTM International Standard Test Method for Determination of Chlorinated Organic Acid Compounds in Water by Gas Chromatography with an Electron Capture Detector 1998 ASTM International D5317-20 ASTM International Standard Test Method for Determination of Chlorinated Organic Acid Compounds in Water by Gas Chromatography with an Electron Capture Detector 2020 ASTM International 515.1, Rev. 4.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water December 1988, Revised July 1991 EPA/600/4-88-039 EPA/600/4-88-039 515.2, Rev. 1.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 515.3, Rev. 1.0 EPA In Methods for the Determination of Organic and Inorganic Compounds in Drinking Water, Volume 1 August 2000 EPA 815-R-00-014 National Environmental Methods Index 515.4, Rev. 1.0 EPA Determination of Chlorinated Acids in Drinking Water by Liquid-Liquid Microextraction, Derivatization, and Fast Gas Chromatography with Electron Capture Detection April 2000 EPA/815/B-00/001 EPA/815/B-00/001 555, Rev. 1.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement II August 1992 EPA/600/R-92/129 National Environmental Methods Index 6640 B Standard Methods Standard Methods for the Examination of Water and Wastewater, 21st Edition 2005 Standard Methods 6640 B Standard Methods Standard Methods for the Examination of Water and Wastewater, 22nd Edition 2012 Standard Methods ------- Page 31 of 36 6640 B Standard Methods Standard Methods for the Examination of Water and Wastewater, 23rd Edition 2017 Standard Methods 6640 B Standard Methods Standard Methods for the Examination of Water and Wastewater, 24th Edition 2023 Standard Methods 6640 B-01 Standard Methods Online Online version. Approval year is designated by the last 2 digits. Only online versions cited in the regulations or in Appendix A to Subpart C of Part 141 are approved. 2001 Standard Methods 6640 B-06 Standard Methods Online Online version. Approval year is designated by the last 2 digits. Only online versions cited in the regulations or in Appendix A to Subpart C of Part 141 are approved. 2006 Standard Methods Simazine Note regarding EPA Methods 505, 507 and 508.1: Substitution of the detector specified in Methods 505, 507, or 508.1 for the purpose of achieving lower detection limits is allowed as follows - either an electron capture or nitrogen phosphorus detector may be used provided all regulatory requirements and quality control criteria are met. Method Organization Reference Title Date EPA Publication Number Source of Method 505, Rev. 2.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 507, Rev. 2.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 508.1, Rev. 2.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 525.2, Rev. 2.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 525.3 EPA Determination ofSemivolatile Organic Chemicals in Drinking Water by Solid Phase Extraction and Capillary Column Gas February 2012 EPA/600/R-12/010 EPA/600/R-12/010 ------- Page 32 of 36 Chromatography/Mass Spectrometry (GC/MS) 551.1, Rev. 1.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 536 EPA Determination ofTriazine 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 EPA 815-B-07-002 523 EPA Determination of Triazine Pesticides and their Degradates in Drinking Water by Gas Chromatography/Mass Spectrometry (GC/MS) February 2011 EPA 815-R-11-002 EPA 815-R-11-002 Styrene Method Organization Reference Title Date EPA Publication Number Source of Method 502.2, Rev. 2.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Method Index 524.2, Rev. 4.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 524.3 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry June 2009 EPA 815-B-09-009 EPA 815-B-09-009 524.4 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry using Nitrogen Purge Gas May 2013 EPA 815-R-13-002 EPA 815-R-13-002 ------- Page 33 of 36 T etrachlor oethylene Method Organization Reference Title Date EPA Publication Number Source of Method 502.2, Rev. 2.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Method Index 524.2, Rev. 4.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 524.3 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry June 2009 EPA 815-B-09-009 EPA 815-B-09-009 524.4 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry using Nitrogen Purge Gas May 2013 EPA 815-R-13-002 EPA 815-R-13-002 551.1, Rev. 1.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index Toluene Method Organization Reference Title Date EPA Publication Number Source of Method 502.2, Rev. 2.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Method Index 524.2, Rev. 4.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 524.3 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry June 2009 EPA 815-B-09-009 EPA 815-B-09-009 524.4 EPA Measurement of Purgeable Organic Compounds in Water by May 2013 EPA 815-R-13-002 EPA 815-R-13-002 ------- Page 34 of 36 Capillary Column Gas Chromatography/Mass Spectrometry using Nitrogen Purge Gas Toxaphene Method Organization Reference Title Date EPA Publication Number Source of Method 505, Rev. 2.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 508, Rev. 3.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 508.1, Rev. 2.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 525.2, Rev. 2.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 525.3 EPA Determination ofSemivolatile 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 EPA/600/R-12/010 trans-Dichloroethylene Method Organization Reference Title Date EPA Publication Number Source of Method 502.2, Rev. 2.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Method Index 524.2, Rev. 4.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 524.3 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas June 2009 EPA 815-B-09-009 EPA 815-B-09-009 ------- Page 35 of 36 Chromatography/Mass Spectrometry 524.4 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry using Nitrogen Purge Gas May 2013 EPA 815-R-13-002 EPA 815-R-13-002 Trichloroethylene Method Organization Reference Title Date EPA Publication Number Source of Method 502.2, Rev. 2.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Method Index 524.2, Rev. 4.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 524.3 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry June 2009 EPA 815-B-09-009 EPA 815-B-09-009 524.4 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry using Nitrogen Purge Gas May 2013 EPA 815-R-13-002 EPA 815-R-13-002 551.1, Rev. 1.0 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index Vinyl Chloride Method Organization Reference Title Date EPA Publication Number Source of Method 502.2, Rev. 2.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Method Index ------- Page 36 of 36 524.2, Rev. 4.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 524.3 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry June 2009 EPA 815-B-09-009 EPA 815-B-09-009 524.4 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry using Nitrogen Purge Gas May 2013 EPA 815-R-13-002 EPA 815-R-13-002 Xylenes (to tan Method Organization Reference Title Date EPA Publication Number Source of Method 502.2, Rev. 2.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Method Index 524.2, Rev. 4.1 EPA In Methods for the Determination of Organic Compounds in Drinking Water - Supplement III August 1995 E PA/600/R-95-131 National Environmental Methods Index 524.3 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry June 2009 EPA 815-B-09-009 EPA 815-B-09-009 524.4 EPA Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry using Nitrogen Purge Gas May 2013 EPA 815-R-13-002 EPA 815-R-13-002 ------- |