Utilities Urge States to Reject New WET Discharge Test, Citing Inaccuracy

Wastewater utilities are urging states to reject EPA's new tool for calculating the aggregate toxicity of multiple pollutants, charging that the software is as much as 16 percent less accurate than the decade-old computer program it replaces, and that it could lead to widespread adoption of the agency's controversial whole effluent toxicity (WET) tests. "It has the potential to increase the rate of false positives," Jamie Mitchell, of the National Association of Clean Water Agencies (NACWA), said at the group's...