Permitted Facility Information

Branch Main Number 919-743-8401

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 ATB for individual chemical use approval based on concentration, degradation and toxicity of the compound  

Please contact ATB if you have any questions regarding the ability of your facility to meet this requirement.

NC DWR Whole Effluent Toxicity (WET) Guidance

NC DWR Whole Effluent Toxicity (WET) Reporting Forms

NC DWR Whole Effluent Toxicity (WET) Enforcement Policy

Whole Effluent Toxicity Program Summary Statistics

Toxicity Reduction Evaluation (TRE)




Environmental Sciences Section 1621 Mail Service Center Raleigh, NC 27699-1621 919.743.8400