State Wastewater Discharge Permit

What is the purpose of this permit?

State waste discharge permits either prevent pollution of groundwater or prevent the upset of wastewater treatment systems by limiting the discharge of pollutants.

  • Facilities that discharge wastewater pollutants to land must apply for a State Wastewater Discharge Permit to Discharge Industrial Wastewater to Ground Water by Land Treatment or Application.
  • Industrial facilities that discharge wastewater to privately or publicly-owned wastewater treatment plants must obtain a State Wastewater Discharge Permit to Discharge Industrial Wastewater to a Publicly-Owned Works (POTW) unless it has obtained a pretreatment discharge permit issued by a delegated municipality.

See the ORIA Regulatory Handbook pages for those permits for more details.

Who issues this permit?
Department of Ecology
Contacts:
Department of Ecology
Water Quality Program
Headquarters
300 Desmond Drive
PO Box 47600
Olympia WA 98504-7600
Website: https://ecology.wa.gov/About-us/Get-to-know-us/Our-Programs/Water-Quality
Fax: (360) 407-6426
Telephone: (360) 407-6600
Department of Ecology, Northwest Region
Water Quality Program
3190 - 160th Ave SE
Bellevue WA 98008-5452
Website: https://ecology.wa.gov/About-us/Get-to-know-us/Our-Programs/Water-Quality
Telephone: (425) 649-7000
Department of Ecology, Southwest Region
Water Quality Program
300 Desmond Dr
PO Box 47775
Olympia WA 98504-7775
Website: https://ecology.wa.gov/About-us/Get-to-know-us/Our-Programs/Water-Quality
Telephone: (360) 407-6400
Department of Ecology, Central Region
Water Quality Program
15 Yakima Avenue
Suite 200
Yakima WA 98902-3452
Website: https://ecology.wa.gov/About-us/Get-to-know-us/Our-Programs/Water-Quality
Telephone: (509) 575-2490
Department of Ecology, Eastern Region
Water Quality Program
4601 N. Monroe
Spokane WA 99205-1295
Website: https://ecology.wa.gov/About-us/Get-to-know-us/Our-Programs/Water-Quality
Telephone: (509) 329-3571
Telephone: (509) 329-3400
Triggering Questions:
  • Will the project involve a discharge of wastewater to the ground or a discharge of industrial wastewater to a municipal treatment plant?
* Permit information last updated 7/25/2016
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