Regulations & Permits

Use this portal to filter and search for all of our regulatory information.

We oversee many state and federal laws designed to protect Washington's land, air, and water. See our laws, rules, & rulemaking page for more information about our current rules and rulemaking.

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Western Washington Phase II Municipal Stormwater Permit Appendix 5

Appendix 5. Notice of Intent for Coverage

https://ecology.wa.gov/wwaphaseii-app5

Western Washington Phase II Municipal Stormwater Permit Appendix 6

Appendix 6. Street Waste Disposal

https://ecology.wa.gov/wwaphaseii-app6

Western Washington Phase II Municipal Stormwater Permit Appendix 7

Appendix 7. Determining Construction Site Sediment Damage Potential

https://ecology.wa.gov/wwaphaseii-app7

Western Washington Phase II Municipal Stormwater Permit Appendix 8

Appendix 8. Annual Report Questions for New Permittees

https://ecology.wa.gov/wwaphaseii-app8

Western Washington Phase II Municipal Stormwater Permit Appendix 9

Appendix 9. Stormwater Discharge Monitoring

https://ecology.wa.gov/wwaphaseii-app9

November 11, 2011 Fact sheet

Western Washington Phase II Municipal Stormwater Permit November 11, 2011 Fact sheet

https://ecology.wa.gov/wwaphaseiifactsheetfinal

Response to comments on modified Zostera japonica Management General Permit

Modified Zostera japonica Management General Permit Response to comments.

https://ecology.wa.gov/zjpermitmodappendixd04052017

Western Washington Phase II Municipal Stormwater Permit

Current permit, effective 2013-2018, modified in 2014

https://ecology.wa.gov/wwaphaseii-permit-2014final

Zostera japonica Management General Permit

The Zostera japonica Management on Commercial Clam Beds in Willapa Bay permit is a combined National Pollutant Discharge Elimination System (NPDES) and State Waste Discharge General Permit. It allows the use of imazamox and marker dyes on commercial clam beds (excluding geoduck), in Willapa Bay only, for control of Zostera japonica eelgrass, a Class C noxious weed.

https://ecology.wa.gov/zjpermitmodification04052017

Wastewater Treatment Plant Award Recipients

Current Year Wastewater Treatment Plant Award Recipients

https://ecology.wa.gov/wwtp-award-list

Beneficial use determinations

Learn about beneficial use determinations — exemptions from solid waste permitting requirements.

https://ecology.wa.gov/regulations-permits/permits-certifications/solid-waste-permits/beneficial-use-determinations

Aquatic & Invasive Species Control

We have issued a combined state agency general permit.

https://ecology.wa.gov/regulations-permits/permits-certifications/aquatic-pesticide-permits/aquatic-invasive-species-control

Certification information

We certify wastewater treatment plant operators to ensure that Washington’s waters are protected.

https://ecology.wa.gov/regulations-permits/permits-certifications/wastewater-operator-certification/certification-information

Changes to existing water rights

If you want to change to an existing water right, we recommend a pre-application consultation.

https://ecology.wa.gov/regulations-permits/permits-certifications/water-right-permits/changes-to-existing-water-rights

Professional growth and training

Wastewater operators must maintain & document professional growth training.

https://ecology.wa.gov/regulations-permits/permits-certifications/wastewater-operator-certification/training-professional-development

General orders for air quality permits

A general order is a streamlined group permit for common commercial sources of air pollution.

https://ecology.wa.gov/regulations-permits/permits-certifications/air-quality-permits/air-quality-general-orders

Burn permits

Burn permits for agricultural, outdoor, or residential burning.

https://ecology.wa.gov/regulations-permits/permits-certifications/air-quality-permits/burn-permits

Notice of construction permit

Businesses must get a permit before installing or changing a source of air pollution.

https://ecology.wa.gov/regulations-permits/permits-certifications/air-quality-permits/notice-of-construction-permit

Prevention of Significant Deterioration (PSD) permit

Prevention of Significant Deterioration (PSD) permits for major sources of air pollution.

https://ecology.wa.gov/regulations-permits/permits-certifications/air-quality-permits/prevention-of-significant-deterioration-psd

Irrigation System Aquatic Weed Control permit

This permit regulates the use of pesticides to manage plant and algae growth in irrigation systems.

https://ecology.wa.gov/regulations-permits/permits-certifications/aquatic-pesticide-permits/irrigation-system-aquatic-weed-control