Approved CWA Microbiological Test Methods
The analytical methods promulgated under Clean Water Act Section 304(h) are sometimes referred to as the "304(h)" or "Part 136" methods. The methods measure chemical and biological pollutants in media, such as wastewater, ambient water, sediment, and biosolids (sewage sludge). These various CWA methods are tested in a variety of labs and matrices.
Part 136 methods, some approved industry-specific methods are published or incorporated by reference at 40 CFR Parts 401 through 503.
In addition to On this page:
- Approved methods listed by method number
- Approved methods listed by analyte (reference tables in 40 CFR 136.3)
Approved Methods Listed by Method Number
- Regulatory History:
- Regulatory History:
Approved Methods Listed by Analyte
The lists of approved methods at 40 CFR 136.3, with footnotes, are provided here as a reference. To download specific method publications, refer to the tables.
- Lists of methods by analyte; from 40 CFR 136.3
- Table I A: Biological Methods for Wastewater and Sewage Sludge
- Table I H: Microbiological Methods for Ambient Water