Regulations & Permits

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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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Regulations & Permits

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

Regulations & Permits icon

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.

See more about this collection...
2018 South Skagit Bay Assessment Update
Working with Dept. of Health we've identified South Skagit Bay as a priority area to improve water quality. This is a summary of our work for 2018.
https://ecology.wa.gov/south-skagit-bay-assessment-update
Spreadsheet of TEC & DWEC
This spreadsheet includes the proposed revisions to policy 1-11 assessment of tissue and water data for human health
https://ecology.wa.gov/spreadsheet-of-tec-dwec
SoapLakeOustandingWaterLetter
This letter was sent in response to the application for Soap Lake to become an Outstanding Resource Water
https://ecology.wa.gov/soaplakeoustandingwaterletter
Spokane River Stewardship Partners Policy 1-11 comment letter
2017 Spokane River Stewardship Partners comment letter on WQ Assessment Policy 1-11 updates
https://ecology.wa.gov/srspcomment_hhc_3-15-2017
Ecology Water Quality Stormwater Capacity Grants Guidance
Guidance for applying for Ecology Water Quality Stormwater Capacity Grants
https://ecology.wa.gov/stormwater-capacity-grants-prgm-guidance
Stipulated stay March 2022
This is a stipulated partial stay from March 2022 for the Nutrient General Permit
https://ecology.wa.gov/stipulated-stay-march-2022
Soos Creek SAP Appendix 1: 7-DADMAX thermal record graphs
7-DADMAX thermal record graphs for Soos Creek Watershed Temperature and DO TMDL Study and Analysis Plan, Appendix 1
https://ecology.wa.gov/soos-creek-sap-appendix-1-7-dadmax-thermal-record
Soos Creek SAP Appendix 2: Historical dissolved oxygen data
Historical dissolved oxygen data
https://ecology.wa.gov/soos-creek-sap-appendix-2-historical-dissolved-ox
Soos Creek SAP Appendix 3: Discharge, water temperature, air temperature graphs
Discharge, water temperature, air temperature graphs
https://ecology.wa.gov/soos-creek-sap-appendix-3-discharge-water-temper
STEPL (Spreadsheet Tool for the Estimation of Pollutant Load) training
Instructions for estimating load reductions using STEPL (Spreadsheet Tool for the Estimation of Pollutant Load)
https://ecology.wa.gov/stepl-powerpoint-2017
Ecology Water Quality Funded Facility Projects Standard Contract Clauses
Ecology Water Quality Funded Facility Projects Standard Contract Clauses
https://ecology.wa.gov/standard-contract-clauses
Soaker Tire-Wash Functional Equivallency
Ecology finds Soaker-Tire Wash system is functional equivalent to BMP C106 (Wheel Wash) for stormwater management.
https://ecology.wa.gov/soakerwheelwashfunctionallyequivalent
Splash Boxx Functional Equivalency
Ecology finds Splash Boxx treatment system is functionally equivalent to a Bioretention Facility (rain garden) when using approved Bioretention Soil Media for stormwater management and must adhere to the guidelines for Bioretention areas found in Best Management Practice T7.30.
https://ecology.wa.gov/splash-boxx
Guidance for demonstrating compliance with water quality standards when using Splash Boxx using the Western Washington Hydrology Model.
PowerPoint report gives the procedure for demonstrating compliance with water quality standards when using Splash Boxx for stormwater management using the Western Washington Hydrology Model.
https://ecology.wa.gov/splashboxxguidence
Stormcrete Precast Porous Concerte Slabs
Functional equivilancy letter.
https://ecology.wa.gov/stormcrete
Ecology Water Quality Funded Stormwater Projects Bid Specification Clauses
Ecology Water Quality Funded Stormwater Projects Bid Specification Clauses
https://ecology.wa.gov/stormwater-bid-specification-clauses
Ecology Water Quality Funded Stormwater Projects Bid Insert
Ecology Water Quality Funded Stormwater Projects Bid Insert
https://ecology.wa.gov/stormwater-bid-insert
2018 Pretreatment Plan Station House Oyster
2018 pretreatment plans on control for commercial clam beds in Willapa Bay for Station House Oyster.
https://ecology.wa.gov/station-2018-pretreatment-plan
2017 Annual Report for Station House Oyster
This annual report covers Zostera Japonica controls on commercial clam beds in Willapa Bay for Station House Oyster.
https://ecology.wa.gov/station-3004-2017-annual-report
Snohomish County 2005 CSWGP Appeal
2005 Construction Stormwater General Permit appeal from Snohomish County.
https://ecology.wa.gov/snohomishcounty
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