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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Adopted rule language (WAC 173-910) 08/23/16

Thsi is adopted rule language for WAC 173-910 Mercury-Containing Lights Product Stewardship Program.

https://ecology.wa.gov/adopted-rule-language-wac-173-910-08-23-16

Adopted rule language for (WAC 173-441) 09/15/16

This is adopted rule language for WAC 173-441 Reporting of Emissions of Greenhouse Gases.

https://ecology.wa.gov/adopted-rule-language-for-wac-173-441-09-15-16

Adopted rule language (WAC 173-501) 05/27/2020

This is the adopted rule language for (WAC 173-501) Instream Resources Protection Program - Nooksack Water Resource Inventory Area (WRIA) 1

https://ecology.wa.gov/adopted-rule-language-wac-173-501-05-27-2020

Adopted rule language (WAC 173-444) 01/06/21

This is adopted rule language for WAC 173-444, Clean Energy Transformation Rule.

https://ecology.wa.gov/adopted-rule-language-wac-173-444-01-06-21

PCR Advisory committee meeting notes

These are notes from an advisory committee meeting, dealing with definitions regarding Washington's requirements for products to contain recycled material.

https://ecology.wa.gov/advisory-committee-meeting-notes

Adopted rule language (WAC 173-446A) 06-01-22

This is adopted rule language for Chapter 173-446A WAC, Criteria for Emissions-Intensive, Trade-Exposed Industries.

https://ecology.wa.gov/adopted-rule-language-wac-173-446a-06-01-22

Adopted rule language (WAC 173-446) 9-29-22

This is the adopted rule language for Chapter 173-446 WAC, Climate Commitment Act Program.

https://ecology.wa.gov/adopted-rule-language-wac-173-446-9-29-22

Adopted rule language (WAC 173-455) 11-28-22

This is adopted rule language for Chapter 173-455 WAC, Air Quality Fee Rule.

https://ecology.wa.gov/adopted-rule-language-wac-173-455-11-28-22

Adopted rule language for (WAC 173-442) 09/21/16

This is adopted rule language for WAC 173-442 Clean Air Rule.

https://ecology.wa.gov/adopted-rule-language-for-wac-173-442-09-21-16

Adopted rule language (WAC 173-455) 10/25/18

This is adopted rule language for Chapter 173-455, Air Quality Fee Rule.

https://ecology.wa.gov/adopted-rule-language-wac-173-455-10-25-18

Adopted rule language (WAC 173-443) 12/10/20

This is adopted rule language for WAC 173-443, Hydrofluorocarbons (HFCs).

https://ecology.wa.gov/adopted-rule-language-wac-173-443-12-10-20

Adopted rule language (WAC 173-460) 11/22/19

This is adopted rule language for Chapter 173-460 WAC, Controls for New Sources of Toxic Air Pollutants.

https://ecology.wa.gov/adopted-rule-language-wac-173-460-11-22-19

Adopted Rule Text with Tracked and Footnoted Changes to Current Rule (WAC 173-340) 08/23/23

This document tracks and footnotes adopted changes to current WAC 173-340, Model Toxics Control Act (MTCA) Cleanup Regulations.

https://ecology.wa.gov/adopted-rule-text-with-tracked-and-footnoted-changes-to-current-rule-wac-173-340-08-23-23

Adopted Rule Text with Tracked Changes to Proposed Rule (WAC 173-340) 08/23/23

This document tracks adopted changes to proposed WAC 173-340, Model Toxics Control Act (MTCA) Cleanup Regulations.

https://ecology.wa.gov/adopted-rule-text-with-tracked-changes-to-proposed-rule-wac-173-340-08-23-23

Adopted Rule Text without Tracked Changes (WAC 173-340) 08/23/23

This document displays WAC 173-340, Model Toxics Control Act (MTCA) Cleanup Regulations, with the adopted rule changes. This document does not track or footnote the changes.

https://ecology.wa.gov/adopted-rule-text-with-no-tracked-changes-wac-173-340-08-23-23

Adopted rule language (WAC 173-455) 11-30-23

This is adopted rule language for Chapter 173-455 WAC, Air Quality Fee Rule.

https://ecology.wa.gov/adopted-rule-language-wac-173-455-11-30-23

Adopted rule language (WAC 173-446) 2-21-24

This is adopted rule language for WAC 173-446, Climate Commitment Act Program Rule.

https://ecology.wa.gov/adopted-rule-language-wac-173-446-2-21-24

Agenda (WAC 173-400; WAC 173-401) 4-18-24

This is the agenda for the April 18, 2024 stakeholder meeting for Chapter 173-440 WAC, General Regulations for Air Pollution Sources and Chapter 173-401 WAC, Operating Permit Regulation.

https://ecology.wa.gov/agenda-wac-173-400;-wac-173-401-4-18-24

Adopted rule language (WAC 173-446B)

Adopted rule language WAC 173-446B

https://ecology.wa.gov/adopted-rule-language-wac-173-446b-10-08-24

Adopted rule language (WAC 173-446)

Adopted rule language WAC 173-446

https://ecology.wa.gov/adopted-rule-language-wac-173-446-12-03-24