Washington Water - General: What you need to know

NPDES Permits: Washington Administrative Code (WAC) 173-220-010 to 173-220-240

Wastewater treatment operator certification: WAC 173-230-010 to 173-230-140

Underground injection: WAC 173-218-010 to 173-281-115

Drinking water: WAC 246-290-001 to 246-290-060

Groundwater: Revised Code of Washington (RCW) 90.44.010 to 90.44.460

Floodplains and wetlands:

Shoreline Management Act of 1971, RCW 90.58.010 to 90.58.920

State Hydraulic Code, RCW 75.20

State Environmental Policy Act, WAC 197-11

Floodplains Management Program, RCW 86.16

Puget Sound research and monitoring program: RCW 90.71.060

Washington Department of Ecology (WDOE) Water Quality Program

Washington Department of Fish and Wildlife (DFW) Habitat Management Division

Washington Department of Agriculture (WDOA)

Washington Department of Natural Resources (DNR) Forest Practices Division

Washington Department of Health (DOH)

U.S. Environmental Protection Agency (EPA) Region 10

U.S. Army Corps of Engineers (Corps) District Offices: Seattle, Walla Walla, and Portland

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

• Rules. The state's program for water quality permits predates the federal National Pollutant Discharge Elimination System (NPDES) permit program for industrial wastewater dischargers. As a result, some facilities are required to obtain both NPDES permits and state discharge permits. 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 ...