Washington Stormwater-General regulations & environmental compliance analysis

Washington Stormwater-General: What you need to know

Governing Law and Regulations

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

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Overview: WAC 173-220-020

Regulatory Agencies

Washington Department of Ecology (WDOE) Water Quality Program

U.S. 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 federal National Pollutant Discharge Elimination System (NPDES) wastewater permit program, including general permit authority for stormwater discharges. The Washington Department of Ecology (WDOE) rules generally follow the federal permitting regulations for stormwater discharges with additional requirements, including the use of state-specific Notice of Intent (NOI) application forms and the requirement that fees be paid for stormwater permits. For more information on NPDES permitting requirements, see the state section NPDES PERMIT.

See the state sections STORMWATER—INDUSTRIAL FACILITIES, STORMWATER— CONSTRUCTION ACTIVITIES, and STORMWATER—MUNICIPALITIES for more information on the state requirements for these specific discharges. See the national section STORMWATER— GENERAL for information on the federal permitting program.

Administration and enforcement. WDOE's Water Quality Program is responsible for the administration and enforcement of the NPDES stormwater discharge permit regulations in Washington.

State Requirements


WAC 173-220-020

No pollutants may be discharged to any surface water of the ...

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