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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ECY to Pend Oreille County regarding SEPA lead request

ECY response to Pend Oreille County Commissioners' letter requesting Ecology take the lead agency role in Environmental review of PacWest Silicon’s proposal

https://ecology.wa.gov/ecy-to-po-commissoners_lead-ag_july2018

Pend Oreille County request for ECY SEPA lead

Pend Oreille County Commissioners' letter requesting Ecology take the lead agency role in Environmental review of PacWest Silicon’s proposal

https://ecology.wa.gov/po-county-to-ecy-request-lead-agency-status

Guidance for Marine Net Pen Aquaculture in Washington State

Proposed guidance for net pen aquaculture management and operations in Puget Sound and the Strait of Juan de Fuca.

https://ecology.wa.gov/guidance-for-marine-net-pen-aquaculture-in-washing

Freshwater Algae Control Grant Program - SFY 2019 Final Offer List

For the Fresh Water Algae Control grants funding program, this is the State Fiscal Year 2019 Final Offer List showing which projects will be offered funding and how much is being offered to them.

https://ecology.wa.gov/fwac-prgm-sfy-2019-final-offer-list

Rulemaking Announcement (WAC 173-50) 10/10/22

This is a rulemaking announcement (CR-101) for WAC 173-50 Accreditation of Environmental Laboratories.

https://ecology.wa.gov/rulemaking-announcement-wac-173-50-10-10-22

MTCAStat97: Backgound Module

A statistical analysis tool / workbook for analyzing background data for sites cleaned up under the Model Toxics Control Act.

https://ecology.wa.gov/mtcastat97backgroundmodule

MTCAStat97: Site Module

A statistical analysis tool / workbook for calculating compliance statistics for sites cleaned up under the Model Toxics Control Act.

https://ecology.wa.gov/mtcastat97sitemodule

MTCASTtat97: Technical supplement #1

Statistical guidance for using MTCAStat97 for sites cleaned up under the Model Toxics Control Act.

https://ecology.wa.gov/mtcastattechsupplement

Aquatic Invasive Plants grants funding program - FY2019 Final Offer List

For the Aquatic Invasive Plants grants funding program, this is the State Fiscal Year 2019 Final Offer List showing which projects will be offered funding and how much is being offered to them.

https://ecology.wa.gov/fy2019-aip-final-offer-list

Package A - Natural Attenuation Tool (Modules 1,2,3)

A calculation tool for demonstrating natural attenuation of groundwater is occurring and help predict when groundwater cleanup levels will be met under the Model Toxics Control Act.

https://ecology.wa.gov/pkganaturalattenuation

Clean Watershed Needs Survey - Calendar year 2018 Overview

This document provides an overview of the calendar year 2018 cycle of the Clean Watershed Needs Survey process for reviewing state watersheds to make a list of their water issues and needs

https://ecology.wa.gov/cwns-cy2018-overview

Package B - Natural Attenuation (Modules 4,5,6)

A calculation tool for demonstrating natural attenuation of groundwater is occurring and help predict when groundwater cleanup levels will be met under the Model Toxics Control Act.

https://ecology.wa.gov/pkgbnaturalattenuation

Preliminary Decisions Presentation (WAC 173-201A)

This is a public webinar presentation about the preliminary decisions to revise water contact recreational use criteria in the surface water quality standards (WAC 173-201A).

https://ecology.wa.gov/preliminary-decisions-presentation-wac-173-201a

Columbia River Temperature TMDL Comment

Ecology's comment letter on EPA's Temperature TMDL for the Columbia and Snake Rivers

https://ecology.wa.gov/columbia-river-tmdl-comment

Septic fact sheet W WA

Washington Waters Ours to Protect septic fact sheet W WA

https://ecology.wa.gov/septic-fact-sheet-w-wa

Manure fact sheet W WA

Washington Waters Ours to Protect manure fact sheet W WA

https://ecology.wa.gov/manure-fact-sheet-w-wa

Dog poop fact sheet Spanish

Washington Waters Ourt to Protect dog poop fact sheet Spanish

https://ecology.wa.gov/dog-poop-fact-sheet-spanish

Manure poster

Washington Waters Ours to Protect manure poster W WA

https://ecology.wa.gov/manure-poster-w-wa

Dog poop poster E WQ

Washington Waters Ours to Protect dog poop poster E WA

https://ecology.wa.gov/dog-poop-poster-e-wa

2018-2023 Municipal permit recommendations from Stormwater Work Group

Overall recommendations for RSMP funding and administration through the permits, Recommendations for the S8.B Status and Trends Monitoring, Recommendations for S8.C Effectiveness Studies, and Recommendations for S8.D Source Identification and Diagnostic Monitoring.

https://ecology.wa.gov/finals8recommendations1june2016