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.
Municipal stormwater general permits
This permit covers urban areas that collect stormwater runoff in public storm sewer systems.
https://ecology.wa.gov/regulations-permits/permits-certifications/stormwater-general-permits/municipal-stormwater-general-permits
Sand & Gravel General Permit history
Find historical information about our Sand and Gravel General Permit.
https://ecology.wa.gov/regulations-permits/permits-certifications/sand-gravel-general-permit/sand-gravel-general-permit-history
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
Aquatic Mosquito Control General Permit
This permit allows the use of insecticides to control mosquitoes.
https://ecology.wa.gov/regulations-permits/permits-certifications/aquatic-pesticide-permits/aquatic-mosquito-control
401 Water Quality Certifications for federal facilities
EPA writes NPDES permits for federal facilities. We issue water quality certifications for permits.
https://ecology.wa.gov/regulations-permits/permits-certifications/401-water-quality-certification/certifications-for-npdes-federal-permits
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
Aquatic Noxious Weed Control General Permit
We issue this general permit to manage freshwater and marine noxious weeds in Washington.
https://ecology.wa.gov/regulations-permits/permits-certifications/aquatic-pesticide-permits/aquatic-noxious-weed-control
Aquatic Plant & Algae Management General Permit
This permit covers the in-water and shoreline management of plants, algae, and phosphorus.
https://ecology.wa.gov/regulations-permits/permits-certifications/aquatic-pesticide-permits/aquatic-plant-algae-management
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
Burrowing shrimp control (Imidacloprid)
We are denying a request to use imidacloprid on shellfish beds in Willapa Bay & Grays Harbor.
https://ecology.wa.gov/regulations-permits/permits-certifications/aquatic-pesticide-permits/burrowing-shrimp-control-imidacloprid
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
Zostera japonica management on commercial clam beds in Willapa Bay General Permit
This permit allows the use of an herbicide to control non-native eelgrass in Willapa Bay.
https://ecology.wa.gov/regulations-permits/permits-certifications/aquatic-pesticide-permits/zostera-japonica-eelgrass-management
Beneficial Use Determination registry
List of all pending or approved beneficial use determinations.
https://ecology.wa.gov/regulations-permits/permits-certifications/solid-waste-permits/beneficial-use-determinations/beneficial-use-determinations-registry
Permit Register
The Permit Register includes actions or changes to air operating permits.
https://ecology.wa.gov/regulations-permits/permits-certifications/air-quality-permits/air-operating-permit/permit-register
Health impact review of toxic air pollution
We must review new projects that emit toxic air pollutants.
https://ecology.wa.gov/regulations-permits/permits-certifications/air-quality-permits/notice-of-construction-permit/health-impact-assessments-of-toxic-air-pollutants
Construction stormwater general permit history
CSWGP documentation from previous permit reissuance and appeals processes.
https://ecology.wa.gov/regulations-permits/permits-certifications/stormwater-general-permits/construction-stormwater-permit/permit-history
Municipal stormwater permit reissuance
Information about the reissuance of 2024 Western and Eastern Washington Municipal Stormwater permits.
https://ecology.wa.gov/regulations-permits/permits-certifications/stormwater-general-permits/municipal-stormwater-general-permits/municipal-stormwater-permit-reissuance
Phase I Municipal Stormwater Permit
This permit regulates stormwater discharges in the most highly populated areas in Washington.
https://ecology.wa.gov/regulations-permits/permits-certifications/stormwater-general-permits/municipal-stormwater-general-permits/municipal-stormwater-phase-i-permit
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