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Clean Water Act Analytical Methods
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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)
  • CWA Methods Home
  • PFAS Methods
  • Methods Update Rules
  • Approved Chemical Methods
    • Inorganic Non‑Metals
    • Metals
    • Organic
  • Approved Microbiological Methods
  • Approved WET Methods
  • Approved Radiochemical Methods
  • Approved Industry-Specific Methods
  • Other CWA Methods: Chemical
  • Other CWA Methods: Microbiological
  • Other CWA Methods: Biosolids
  • Alternate Test Procedures
  • Regulatory History
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on August 20, 2020
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