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.
SEPA checklist guidance, Section B: Water
Guidance to complete Water section for Part B of SEPA environmental checklist.
https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-guidance/sepa-checklist-guidance/sepa-checklist-section-b-environmental-elements/environmental-elements-3-water
SEPA checklist guidance, Section B: Plants
SEPA Guidance for Plants section, Part B for the state Environmental Checklist.
https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-guidance/sepa-checklist-guidance/sepa-checklist-section-b-environmental-elements/environmental-elements-4-plants
SEPA checklist guidance, Section B: Animals
Guidance for Part B, Animals section for SEPA environmental checklist.
https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-guidance/sepa-checklist-guidance/sepa-checklist-section-b-environmental-elements/environmental-elements-5-animals
SEPA checklist guidance, Section B: Energy & natural resources
Guidance for Energy & natural resources section for Part B, SEPA environmental checklist.
https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-guidance/sepa-checklist-guidance/sepa-checklist-section-b-environmental-elements/environmental-elements-6-energy-natural-resou
SEPA checklist guidance, Section B: Environmental health
Guidance for Environmental Health section of Part B for SEPA environmental checklist.
https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-guidance/sepa-checklist-guidance/sepa-checklist-section-b-environmental-elements/environmental-elements-7-environmental-health
SEPA checklist guidance, Section B: Land & shoreline use
Guidance for Land & shoreline use in Part B of SEPA environmental checklist.
https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-guidance/sepa-checklist-guidance/sepa-checklist-section-b-environmental-elements/environmental-elements-8-land-shoreline-use
SEPA checklist guidance, Section B: Housing
Guidance for completing Housing section for Part B of the SEPA environmental checklist.
https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-guidance/sepa-checklist-guidance/sepa-checklist-section-b-environmental-elements/environmental-elements-9-housing
SEPA checklist guidance, Section B: Aesthetics
Guidance for completing Aesthetics section for Part B of the SEPA environmental checklist.
https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-guidance/sepa-checklist-guidance/sepa-checklist-section-b-environmental-elements/environmental-elements-10-aesthetics
SEPA checklist guidance, Section B: Light & glare
Guidance for completing Light & glare section in Part B of the SEPA environmental checklist.
https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-guidance/sepa-checklist-guidance/sepa-checklist-section-b-environmental-elements/environmental-elements-11-light-glare
SEPA checklist guidance, Section B: Recreation
Guidance for completing Recreation section for Part B of SEPA environmental checklist.
https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-guidance/sepa-checklist-guidance/sepa-checklist-section-b-environmental-elements/environmental-elements-12-recreation
SEPA checklist guidance, Section B: Historic & cultural preservation
Guidance for historic & cultural preservation section in SEPA environmental checklist.
https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-guidance/sepa-checklist-guidance/sepa-checklist-section-b-environmental-elements/environmental-elements-13-historic-cultural-p
SEPA checklist guidance, Section B: Transportation
Guidance for Transportation section for Part B of SEPA environmental checklist.
https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-guidance/sepa-checklist-guidance/sepa-checklist-section-b-environmental-elements/environmental-elements-14-transportation
SEPA checklist guidance, Section B: Public services
Guidance for completing Public Services section of Part B of SEPA environmental checklist.
https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-guidance/sepa-checklist-guidance/sepa-checklist-section-b-environmental-elements/environmental-elements-15-public-services
SEPA checklist guidance, Section B: Utilities
Guidance to complete Utilities section of Part B of SEPA environmental checklist.
https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-guidance/sepa-checklist-guidance/sepa-checklist-section-b-environmental-elements/environmental-elements-16-utilities
SEPA checklist guidance, Section B: Surface water
Guidance to complete Surface water section for Part B of SEPA environmental checklist.
https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-guidance/sepa-checklist-guidance/sepa-checklist-section-b-environmental-elements/environmental-elements-3-water/environmental-elements-surface-water
SEPA checklist guidance, Section B: Groundwater
Guidance to complete Groundwater section for Part B of SEPA environmental checklist.
https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-guidance/sepa-checklist-guidance/sepa-checklist-section-b-environmental-elements/environmental-elements-3-water/environmental-elements-groundwater
Seismic measures for Class 1 Facilities
We amended WAC 173-180-330 and 173-180-340 in June 2023.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/guidance-for-oil-industry/facilities-seismic-measures
Class 1 Facility out of service and decommissioning
We amended WAC 173-180 in July 2023.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/guidance-for-oil-industry/facilities-out-of-service
Clean energy coordination
We provide information on how clean energy projects are sited, reviewed, and permitted.
https://ecology.wa.gov/regulations-permits/sepa/clean-energy
Clean Energy Coordinated Permit Process
We assist with pre-application discussions, environmental review and permit processes.
https://ecology.wa.gov/regulations-permits/sepa/clean-energy/clean-energy-coordinated-permit-process
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