Documents related to the Clean Water Act Alternate Test Procedure program.
Final Protocols (replaces 2016 draft protocols)
You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.
Protocol for Review and Validation of Alternate Test Procedures for Regulated Organic and Inorganic Analytes in Wastewater Under EPA’s Alternate Test Procedure Program (PDF)(62 pp, 827 K,
The protocol provides guidance for validation, submission, and EPA review of ATP applications under EPA’s National ATP Program submitted for modifications of an EPA-approved method or a procedure that uses the same determinative technique and measures the same analyte(s) of interest as an approved method.
Protocol for Review and Validation of New Methods for Regulated Organic and Inorganic Analytes in Wastewater Under EPA’s Alternate Test Procedure Program (PDF)(87 pp, 875 K,
This protocol represents EPA’s “best thinking” about the information that is useful in making the determination of whether or not to approve use of any new method for organic and inorganic analytes.
- EPA Microbiological Alternate Test Procedure (ATP) Protocol for Drinking Water, Ambient Water, Wastewater and Sewage Sludge Monitoring Methods (PDF)(94 pp, 851 K, September 2010, 821-B-10-001)
- Flexibility to Modify CWA Methods; Memorandum (PDF)(6 pp, 3 MB, November 20, 2007)
- Guidelines and Format for Methods to be Proposed at 40 CFR Part 136 or Part 141 (PDF)(60 pp, 394 K, July 1996)