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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MS4 Permit Secondary Permitee List

List of Secondary Permittee for municipal stormwater permits

https://ecology.wa.gov/ms4-permit-secondary-permitee-list

NSIA_ColumbiaRiverkeeper_SaveOurWildSalmon Request for TDG Short-term Mod

A letter from NSIA, Columbia Riverkeeper, and Save Our Wild Salmon requesting a short-term modification to total dissolved gas criteria of WAC 173-201A-200(1)(f)(ii).

https://ecology.wa.gov/nsia_columbiariverkeeper_saveourwildsalmon-request

Estimation Methodology for Razor Clam-Related Trips

Estimation Methodology for spending near Mocrocks and Copalis beaches from razor clam-related trips

https://ecology.wa.gov/nbeachshellfishcalcspndngnea

NoticetoInterestedParties

This is the notice to interested parties that we sent out to all interested stakeholders.

https://ecology.wa.gov/noticetointerestedparties

Ecology Water Quality Funded Activity Projects - BMP Approval Form

Ecology Water Quality Funded Activity Projects' form for getting BMPs approved.

https://ecology.wa.gov/nonpoint-activity-bmp-approval-form

Formal comment letter to EPA about the Clean Water Act Section 401 rule proposal

These are Ecology's official comments submitted to EPA on the proposed changes to the Clean Water Act Section 401.

https://ecology.wa.gov/oct21-epa-letter

Nonpoint Project Budget Template

Project budget template for Nonpoint projects seeking funding from WQ grants or loans

https://ecology.wa.gov/nonpoint-project-budget-template-v1-0

Final MOU WSDA and Ecology 2011

This is the Memorandum of Understanding between Washington Dept. of Agriculture and Ecology. It explains roles and responsibilities of each agency.

https://ecology.wa.gov/mou-agecology-2011final

NRCS Assessment Procedure for Existing Waste Storage Ponds

Review and assessment process for waste storage ponds

https://ecology.wa.gov/nrcs-assessment-procedure-for-existing-waste-stora

Nutrient Source Content Analysis Template

Template for submitting data to CAFO General Permit Annual Reports

https://ecology.wa.gov/nutrient-source-content-analysis-template

Nutrient Sources Applied Template

Template for submitting data to CAFO Annual Report

https://ecology.wa.gov/nutrient-sources-applied-template

Crosswalk: Western Washington Phase II and Phase I permits; 2014 Stormwater Management Manual for Western Washington; Municipal Separate Storm Sewer System (MS4) (2015)

Refer to Western Washington Phase II and Phase I Permit references to the 2014 Stormwater Management Manual for Western Washington sections and how they relate to the Municipal Separate Storm Sewer System (MS4) permits

https://ecology.wa.gov/ms4permit-to-swmmww-2015

Local Limits Spreadsheet

This spreadsheet helps individual water quality permittees to develop local discharge limitations.

https://ecology.wa.gov/newl11blank

Draft Aquatic Noxious Weed Control NPDES General Permit

Aquatic Noxious Weed Control NPDES General Draft Permit.

https://ecology.wa.gov/noxiousdraftfs100511

Aquatic Noxious Weed Control NPDES General Permit

The general permit covers the indirect discharge of herbicides, adjuvants, and marker dyes into estuaries, marine areas, wetlands, along lake shorelines, rivers, streams, and other wet areas to manage Spartina and freshwater noxious weeds in Washington. An indirect discharge occurs when there may be incidental overspray or dripping of a chemical from the treated plants into waters of the state.

https://ecology.wa.gov/noxiouspermitfinal050712

Aquatic Noxious Weed Control NPDES General Permit Response to Comments

Response to Comments for the Aquatic Noxious Weed Control NPDES General Permit.

https://ecology.wa.gov/noxiousweedappendixdresponsetocomment

Willapa-Grays Harbor Oyster Growers Association v. Ecology Dismissal

This is the legal dismissal order for the Willapa-Grays Harbor Oyster Growers Association v. Ecology PCHB case

https://ecology.wa.gov/oct-2019-dissmisal-order

2018 Nisbet Pretreatment Plan

Pretreatment plan for Zostera japonica controls on commercial clam beds in Willapa Bay for Nisbet.

https://ecology.wa.gov/nisbet-2018-pretreatment-plan

2018 Pretreatment Plan Northern Oyster

2018 pretreatment plans on control for commercial clam beds in Willapa Bay.

https://ecology.wa.gov/northern-2018-pretreatment-plan

2017 Annual Report for Northern Oyster Co.

Annual report reviews Zostera Japonica controls on commercial clam beds in Willapa Bay for Northern Oyster Co.

https://ecology.wa.gov/northern-3007-annual-report-1