Aquatic Toxicology Unit (ATU)
Unit Main Number: 919-743-8401
ATTENTION: REVISED ATU CRITERIA & PROCEDURES
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About the Aquatic Toxicology Unit (ATU)
North Carolina state water quality standards require the protection of all aquatic species from the effects of pollution or other man-induced detriment. Though many numeric water quality standards are based on the measured effects of individual chemicals, measurements can be made of only a small percentage of the chemicals in production today and those measurements cannot predict the effects of complex chemical mixtures. In order to evaluate these biological effects, aquatic toxicology tests are utilized by the Aquatic Toxicology Unit (ATU), allowing for the determination of the combined effects of all constituents of a solution.
NPDES compliance and enforcement
Information for Permitted Facilities
Facility Whole Effluent Toxicity (WET) testing guidance and reporting forms
Information for Certified Biological Testing Laboratories
Whole Effluent Toxicity (WET) testing procedures
ATU Staff Contacts:
Environmental Sciences Section 1621 Mail Service Center Raleigh, NC 27699-1621 919.743.8400