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Delaware Bioassays and Biomonitoring: What you need to know

Governing Law and Regulations

Water pollution control regulations: 7 Delaware Administrative Code (DE Admin Code) 7201

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Surface water quality standards: 7 DE Admin Code 7401

Water-quality-based requirements: 7 DE Admin Code 7201.8

Whole effluent toxicity (WET) testing: 7 DE Admin Code 7401

Regulatory Agencies

Department of Natural Resources and Environmental Control (DNREC) Division of Water Resources (DWR)

U.S. Environmental Protection Agency (EPA) Region 3

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. Delaware is fully authorized by EPA to administer the National Pollutant Discharge Elimination System (NPDES) permit program and to issue individual and general permits that include provisions for effluent toxicity testing using bioassay test methods. See the national section BIOASSAYS/BIOMONITORING for more information.

Administration and enforcement. DNREC's DWR is fully authorized to administer and enforce the state's bioassay and biomonitoring requirements in the NPDES permit program.

State Requirements

WATER-QUALITY-BASED REQUIREMENTS

7 Del. Reg. 7201.8

When surface water quality standards cannot be achieved through the application of technology-based requirements, additional effluent limitations may be imposed to ensure compliance with the state standards. The need for additional effluent limitations and treatment requirements will be based on the results of chemical and/or bioassay tests that assess the potential of the discharge to cause or contribute to in-stream incursions to water quality standards.

WET TESTING

7 Del. Reg. 7401

Under Delaware's NPDES wastewater permit program, the ...


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State Requirements

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Delaware Bioassays and Biomonitoring Resources

Bioassays and Biomonitoring Products

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