Aquatic Toxicology Unit (ATU)
Unit Main Number 919-743-8401
Permitted Facility Information
All permitted dischargers of complex wastewater in the state of North Carolina are required to perform self-monitoring of aquatic toxicity in their wastewater. Information on second species testing, reporting forms, Toxicity Reduction Evaluations (TRE's), Biocides and a list of certified biologcal testing laboratories follows.
Direct discharges which utilize biocidal chemicals in cooling water or similar wastestreams must submit proposed uses to the ATU for individual chemical use approval based on concentration, degradation and toxicity of the compound
Please contact ATU if you have any questions regarding the ability of your facility to meet this requirement.
NC DWQ Whole Effluent Toxicity (WET) Guidance
NC DWQ Whole Effluent Toxicity (WET) Reporting Forms
NC DWQ Whole Effluent Toxicity (WET) Enforcement Policy
Toxicity Reduction Evaluation (TRE)
Environmental Sciences Section 1621 Mail Service Center Raleigh, NC 27699-1621 919.743.8400