Washington NPDES regulations & environmental compliance analysis

Washington NPDES: What you need to know

Governing Law and Regulations

State waste discharge permit program: Washington Administrative Code (WAC) 173-216-010 to 173-216-150

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National Pollutant Discharge Elimination System (NPDES) program: WAC 173-220-010 to 173-220-240

Permit applicability: WAC 173-220-020

Permit applications: WAC 173-220-040

Application process: WAC 173-220-040(4)

Permit modifications: WAC 173-216-130

Permit types:

Individual permits: WAC 173-216-010 to 173-216-150

General permits: WAC 173-226-010 to 173-226-250

Permit standards:

Fees: WAC 173-224-040

Monitoring: WAC 173-220-210(1)

Regulatory Agencies

Washington Department of Ecology (WDOE) Water Quality Program

Environmental Protection Agency (EPA) Region 10

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. Washington is authorized by the U.S. Environmental Protection Agency (EPA) to administer the National Pollutant Discharge Elimination System (NPDES) general wastewater discharge permit program for discharges to state surface waters and for certain industrial users that discharge waste into sanitary sewers. Washington's wastewater discharge permit rules predate the federal NPDES program. As a result, some facilities will be required to obtain both NPDES permits and state discharge permits. A state waste discharge permit is required for discharges to groundwater or to a publicly-owned treatment works (POTW). In order to streamline its dual permitting requirement, the state permit has been incorporated into the NPDES application and permit process. In most cases, issuance of a state permit occurs automatically as a consequence of obtaining a NPDES permit.

The Washington Department of ...

Read more about NPDES