Whole effluent toxicity test method guidelines published

Dec. 4, 2002
EPA has published in the Federal Register "Guidelines Establishing Test Procedures for the Analysis of Pollutants; Whole Effluent Toxicity Test (WET) Methods," a final rule ratifying approval of several test procedures for measuring the toxicity of effluents and receiving waters.


Dec. 4, 2002 -- The Environmental Protection Agency (EPA) on Nov. 19 published in the Federal Register "Guidelines Establishing Test Procedures for the Analysis of Pollutants; Whole Effluent Toxicity Test (WET) Methods," a final rule ratifying approval of several test procedures for measuring the toxicity of effluents and receiving waters.

The Notice also withdrew two WET test methods from the list of nationally-approved biological test procedures and revised some of the methods to improve performance and increase confidence in the results.

The final rule makes minor corrections and clarifications and addresses specific stakeholder concerns. You can view the Guidelines document and learn more about WET methods on the Internet at http://www.epa.gov/waterscience/WET/.

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