Approved CWA Test Methods: Organic Compounds

Methods approved under Clean Water Act section 304(h) and published at 40 CFR Part 136.

August 2017:

Method 608.3 (replaces Method 608)
Method 624.1 (replaces Method 624)
Method 625.1 (replaces Method 625)
Validation of SPE Products and Associated Procedures with Method 625.1

Note: The drinking water method 525.1 is approved for Clean Water Act use, but it is not approved for Safe Drinking Water Act (SDWA) compliance monitoring.

More information on approved SDWA methods

420.1: Phenolics (Spectrophotometric, Manual 4AAP With Distillation) (pdf) (1978)
420.4: Determination of Total Recoverable Phenolics by Semi-Automated Colorimetry; Rev. 1.0 (pdf) (August 1993)
525.1: Determination of Organic Compounds in Drinking Water by Liquid-Solid Extraction and Capillary Column Gas Chromatography/Mass Spectrometry; Rev 2.2 (pdf) (May 1991)
525.2: Determination of Organic Compounds in Drinking Water by Liquid-Solid Extraction and Capillary Column Gas Chromatography/Mass Spectrometry; Rev. 2.0 (pdf) (1995)
601: Purgeable Halocarbons (pdf) (Promulgated 1984)
602: Purgeable Aromatics (pdf) (Promulgated 1984)
603: Acrolein and Acrylonitrile (pdf) (Promulgated 1984)
604: Phenols (pdf) (Promulgated 1984)
605: Benzidines (pdf) (Promulgated 1984)
606: Phthalate Ester (pdf) (Promulgated 1984)
607: Nitrosamines (pdf) (Promulgated 1984)
608.1: Organochlorine Pesticides in Municipal and Industrial Wastewater (pdf) (1993)
608.2: Certain Organochlorine Pesticides in Municipal and Industrial Wastewater (pdf) (1993)
608.3: Organochlorine Pesticides and PCBs by GC/HSD (pdf) (December 2016, 821-R-16-009)
609: Nitroaromatics and Isophorone (pdf) (Promulgated 1984)
610: Polynuclear Aromatic Hydrocarbons (pdf) (Promulgated 1984)
611: Haloethers (pdf) (Promulgated 1984)
612: Chlorinated Hydrocarbons (pdf) (Promulgated 1984)
613: 2,3,7,8-Tetrachlorodibenzo-p-Dioxin (pdf) (Promulgated 1984)
614: Organophosphorus Pesticides in Municipal and Industrial Wastewater (pdf) (1992)
614.1: Organophosphorus Pesticides in Municipal and Industrial Wastewater (pdf) (1992)
615: Chlorinated Herbicides in Municipal and Industrial Wastewater (pdf) (1992)
617: Organohalide Pesticides and PCBs in Municipal and Industrial Wastewater (pdf) (1992)
619: Triazine Pesticides in Municipal and Industrial Wastewater (pdf) (1992)
622: Organophosphorus Pesticides in Municipal and Industrial Wastewater (pdf) (1992)
622.1: Thiophosphate Pesticides in Municipal and Industrial Wastewater (pdf) (1992)
624.1: Purgeables by GC/MS (pdf) (December 2016, 821-R-16-008)
625.1: Base/Neutrals and Acids by GC/MS (pdf) (December 2016, 821-R-16-007)
Validation of SPE Products and Associated Procedures with EPA Method 625.1 (pdf) (December 2016, 821-R-16-020)
Summarizes the requirements for laboratories to utilize solid-phase extraction (SPE) as an extraction technique in EPA Method 625.1.
632: Carbamate and Urea Pesticides in Municipal and Industrial Wastewater (pdf) (1992)
1613: Tetra- through Octa-Chlorinated Dioxins and Furans by Isotope Dilution HRGC/HRMS; Rev. B (pdf) (1994)
1624B: Volatile Organic Compounds by Isotope Dilution GC/MS (pdf) (Promulgated 1984)
1625B: Semivolatile Organic Compounds by Isotope Dilution GC/MS (pdf) (Promulgated 1984)
1664A: n-Hexane Extractable Material (HEM; Oil and Grease) and Silica Gel Treated n-Hexane Extractable Material (SGT-HEM; Non-polar Material) by Extraction and Gravimetry (pdf) (February 1999, 821-R-98-002)
1664B: n-Hexane Extractable Material (HEM; Oil and Grease) and Silica Gel Treated n-Hexane Extractable Material (SGT-HEM; Non-polar Material) by Extraction and Gravimetry (pdf) (February 2010, 821-R-10-001)