Governing Law and Regulations
Michigan Department of Natural Resources and Environment (DNRE)
U.S. Environmental Protection Agency (EPA) Region 5
See ADDRESSES & CONTACTS for addresses and telephone numbers.
See national section for basic information and federal regulations.
Comparison: State vs. Federal
• Rules. Michigan regulations follow the federal standards and provide for toxicity testing of discharges into state waters. Test criteria and compounds are included in the permit documentations issued by DNRE and are particular to each facility.
The state characterizes and controls discharges based on whole effluent toxicity (WET). DNRE has established the several types of conditions for WET in National Pollutant Discharge Elimination System (NPDES) permits, including limits, monitoring requirements, and requirements to conduct toxicity reduction evaluations (TREs).
The Michigan Aquatic Toxicology Laboratory further ensures that water quality standards are met by monitoring WET in discharges from wastewater facilities. In addition, DNRE provides guidance on laboratory certification and has a voluntary Laboratory Recognition Program.
• Administration and enforcement. DNRE administers and enforces the state's effluent toxicity testing requirements.
MAC r. 323.1219
The state has implemented rules that establish water-quality-based effluent limits (WQBELs) for toxic substances for point source discharges that are protective of the ...