NPDES WET programmatic memos and documents.
You will need Adobe Reader to view some of the files on this page. See EPA’s About PDF page to learn more.- Factsheet on the Whole Effluent Toxicity (WET) Analysis Spreadsheet (PDF)(1 pg, 66 K)
- Clarifications Regarding Toxicity Reduction and Identification Evaluations in the National Pollutant Discharge Elimination System Program (03/27/2001) (PDF)(22 pp, 84 K)
- Clarifications Regarding Toxicity Reduction and Identification Evaluations in the NPDES Program Memo (PDF)(2 pp, 227 K)
- Draft National Whole Effluent Toxicity (WET) Implementation Guidance under the NPDES Program (12/28/2004) Memo (PDF)(4 pp, 160 K)
- Draft National Whole Effluent Toxicity (WET) Implementation Guidance under the NPDES Program (12/28/2004) (PDF)(109 pp, 1 MB)
- EPA Whole Effluent Toxicity (WET) Control Policy (07/01/1994) (PDF)(25 pp, 2 MB)
- Memorandum: Certification of "Accuracy" of Information Submissions of Test Results Measuring Whole Effluent Toxicity (03/03/2000) (PDF)(2 pp, 112 K)
- National Policy Regarding Whole Effluent Toxicity (WET) Enforcement (08/14/1995) (PDF)(3 pp, 230 K)
- National Pollutant Discharge Elimination System Test of Significant Toxicity Implementation Document (06/01/2010): Implementation Document (PDF)(73 pp, 755 K)
- National Pollutant Discharge Elimination System Test of Significant Toxicity Implementation Document (06/01/2010) Memo (PDF)(2 pp, 491 K)
- National Pollutant Discharge Elimination System Test of Significant Toxicity Technical Document (06/01/2010) (PDF)(116 pp, 2 MB)
- Toxicity Reduction Evaluation Guidance for Municipal Wastewater Treatment Plants (PDF)(97 pp, 372 K)
- Understanding and Accounting for Method Variability in Whole Effluent Toxicity Applications Under the NPDES Program (PDF)(78 pp, 1 MB)
- Whole Effluent Toxicity (WET) Control Policy (07/01/1994) (PDF)(1 pg, 28 K)