Approved CWA Microbiological Test Methods

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