Clean Water Act Analytical Methods

Approved CWA Test Methods: Organic Compounds

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

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

You will need Adobe Reader to view some of the files on this page. See EPA’s About PDF page to learn more.

420.1: Phenolics (Spectrophotometric, Manual 4AAP With Distillation) (PDF)(5 pp, 92 K, 1978)
420.4: Determination of Total Recoverable Phenolics by Semi-Automated Colorimetry; Rev. 1.0 (PDF)(15 pp, 196 K, 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)(42 pp, 789 K, 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)(61 pp, 258 K, 1995)
601: Purgeable Halocarbons (PDF)(24 pp, 330 K, Promulgated 1984)
602: Purgeable Aromatics (PDF)(23 pp, 322 K, Promulgated 1984)
603: Acrolein and Acrylonitrile (PDF)(21 pp, 263 K, Promulgated 1984)
604: Phenols (PDF)(23 pp, 261 K, Promulgated 1984)
605: Benzidines (PDF)(18 pp, 207 K, Promulgated 1984)
606: Phthalate Ester (PDF)(20 pp, 219 K, Promulgated 1984)
607: Nitrosamines (PDF)(23 pp, 225 K, Promulgated 1984)
608: Organochlorine Pesticides and PCBs (PDF)(33 pp, 397 K, Promulgated 1984)
608.1: Organochlorine Pesticides in Municipal and Industrial Wastewater (PDF)(21 pp, 187 K, 1993)
608.2: Certain Organochlorine Pesticides in Municipal and Industrial Wastewater (PDF)(19 pp, 188 K, 1993)
609: Nitroaromatics and Isophorone (PDF)(20 pp, 212 K, Promulgated 1984)
610: Polynuclear Aromatic Hydrocarbons (PDF)(25 pp, 279 K, Promulgated 1984)
611: Haloethers (PDF)(20 pp, 232 K, Promulgated 1984)
612: Chlorinated Hydrocarbons (PDF)(20 pp, 223 K, Promulgated 1984)
613: 2,3,7,8-Tetrachlorodibenzo-p-Dioxin (PDF)(21 pp, 197 K, Promulgated 1984)
614: Organophosphorus Pesticides in Municipal and Industrial Wastewater (PDF)(21 pp, 176 K, 1992)
614.1: Organophosphorus Pesticides in Municipal and Industrial Wastewater (PDF)(18 pp, 180 K, 1992)
615: Chlorinated Herbicides in Municipal and Industrial Wastewater (PDF)(22 pp, 281 K, 1992)
617: Organohalide Pesticides and PCBs in Municipal and Industrial Wastewater (PDF)(33 pp, 314 K, 1992)
619: Triazine Pesticides in Municipal and Industrial Wastewater (PDF)(22 pp, 358 K, 1992)
622: Organophosphorus Pesticides in Municipal and Industrial Wastewater (PDF)(22 pp, 330 K, 1992)
622.1: Thiophosphate Pesticides in Municipal and Industrial Wastewater (PDF)(22 pp, 210 K, 1992)
624: Purgeables (PDF)(28 pp, 369 K, Promulgated 1984)
625: Base/Neutrals and Acids (PDF)(42 pp, 484 K, Promulgated 1984)
632: Carbamate and Urea Pesticides in Municipal and Industrial Wastewater (PDF)(20 pp, 292 K, 1992)
1613: Tetra- through Octa-Chlorinated Dioxins and Furans by Isotope Dilution HRGC/HRMS; Rev. B (PDF)(89 pp, 511 K, 1994)
1624B: Volatile Organic Compounds by Isotope Dilution GC/MS (PDF)(32 pp, 340 K, Promulgated 1984)
1625B: Semivolatile Organic Compounds by Isotope Dilution GC/MS (PDF)(40 pp, 457 K, 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)(28 pp, 151 K, 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)(35 pp, 481 K, February 2010, 821-R-10-001)