Delaware Effluent Limitations regulations & environmental compliance analysis

Delaware Effluent Limitations: What you need to know

Governing Law and Regulations

Effluent limitations: 7 Delaware Administrative Code (DE Admin Code) 7201.7 and 7 DE Admin Code 7201.8

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Technology-based requirements: 7 DE Admin Code 7201.7

Water quality-based requirements: 7 DE Admin Code 7201.8

Regulatory Agencies

Delaware 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, including all applicable discharge limits. See the national section EFFLUENT LIMITATIONS for additional guidance.

Each NPDES permit contains conditions that ensure compliance with federal and state effluent limitations and water quality standards. See the state section NPDES PERMIT for more information.

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

State Requirements


7 DE Admin Code 7201.7 and 7 DE Admin Code 7201.8

Effluent limitations refer to restrictions on quantity, quality, rate, and concentration of chemical, physical, thermal, biological, and other forms of pollutants. Delaware enforces both technology-based effluent limitations and water quality -based requirements.

Technology-Based Requirements

7 DE Admin Code 7201.7

In Delaware, effluent limitations are based on the use of a "practicable level of pollutant removal technology designed to meet applicable water quality standards."

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