Washington State Department of Ecology

Individual Wastewater Discharge Permits

We have relocated the Permit Documents previously available on this page.

You can now find individual permits in our new searchable database—Water Quality Permitting and Reporting Information System—PARIS.

View permit documents in PARIS

See the Instructions to learn how to find permit documents in PARIS.

Using the PARIS application, you can review and download:

Current (active) permits

Draft permits

Fact sheets

Public Notice Documents

Associated permit documents

Find the comment period for draft permits in the public notice and in the fact sheet or in Ecology’s public involvement calendar.

See the Instructions to learn how to find permit documents in PARIS.

Individual Wastewater Discharge Permits protect water quality by regulating discharges to surface and ground water or municipal wastewater treatment plants. There are two types of Individual Wastewater Discharge Permits. Ecology tailors both types of individual permits to regulate the specific pollutants in the waste discharge.

National Pollution Discharge Elimination System (NPDES) Permits
- Issued to facilities that discharge to surface water such as lakes, rivers, and streams.
State Waste Discharge Permits
- Issued to facilities that discharge to the ground or to a municipal wastewater treatment plant.