Posted August 28, 2014

The Environmental Protection Agency (EPA) has finalized amendments to the Clean Water Act (CWA) regulations to codify that under the National Pollutant Discharge Elimination System (NPDES) program, permit applicants must use “sufficiently sensitive” analytical test methods when completing an NPDES permit application and the Director must prescribe that only “sufficiently sensitive” methods be used for
EPA has modified existing NPDES application, compliance monitoring, and analytical methods regulations. 

The amendments in this rulemaking affect only chemical-specific methods and do not apply to the Whole Effluent Toxicity (WET) methods or their use.