Accounting for Toxicity Test Variability in Evaluating Test Results
Limits on whole effluent toxicity (WET) now have been part of the U.S. Environmental Protection Agency's (EPA) National Pollutant Discharge Elimination System (NPDES) for more than a decade. While it is generally agreed that such limits are an important component of efforts to improve the quality of our nation's surface waters, implementation of WET limits in NPDES permits has been controversial since its inception. Two major issues at the source of the controversy have been (1) “how well do WET test results predict the actual toxic effects of an effluent to the aquatic communities present in receiving waters?” and (2) “how reliable are the tests for measuring effluent toxicity?” Over the past decade a large number of studies have been conducted to address both of these issues, but the issues have not been resolved satisfactorily. This paper presents the results of a research project addressing the precision of WET test procedures, and develops methods for incorporating variance estimators into EPA decisionmaking frameworks. In addition, a national data base of reference toxicity tests, a national data base of WET compliance test results, and a series of case studies are developed in support of the statistical analyses.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
Document Type: Research Article
Publication date: 2002-01-01
More about this publication?
- Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed. A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.
WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
- Subscribe to this Title
- Membership Information
- About WEF Proceedings
- WEFTEC Conference Information
- Learn about the many other WEF member benefits and join today
- Ingenta Connect is not responsible for the content or availability of external websites