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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Rulemaking Announcement (WAC 173-445) 04/30/20

This is a rulemaking announcement (CR-101) for WAC 173-445, Greenhouse Gas Assessment for Projects.

https://ecology.wa.gov/rulemaking-announcement-wac-173-445-04-30-20

Rulemaking proposed language (WAC 173-201A) 02/01/16

This is proposed rule language for WAC 173-201A Water quality standards for surface waters of the state of Washington.

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-201a-02-01

Rulemaking Announcement (WAC 173-566) 08/15/18

This is a rulemaking announcement (CR-101) Chapter 173-566 Streamflow Restoration Funding

https://ecology.wa.gov/rulemaking-announcement-wac-173-566-08-15-18

Rulemaking proposal CR-102 (173-166 WAC) 01/02/2018

This is a rulemaking proposal (CR-102) for WAC 173-166 Emergency Drought Relief

https://ecology.wa.gov/rulemaking-proposal-173-166-wac-01-02-2018

Rulemaking Proposal (WAC 173-350) 1/23/18

This is a rulemaking proposal (CR-102) for WAC 173-350 Solid Waste Handling Standards

https://ecology.wa.gov/rulemaking-proposal-wac-173-350-1-23-18

Rulemaking proposed language (WAC 173-201A) 01/08/15

This is proposed rule language for WAC 173-201A Water quality standards for surface waters of the state of Washington.

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-201a-01-08

Rulemaking Proposal (WAC 173-201A) 02/01/16

This is a rulemaking proposal (CR-102) for WAC 173-201A Water quality standards for surface waters of the state of Washington.

https://ecology.wa.gov/rulemaking-proposal-wac-173-201a-02-01-16

Rulemaking proposed language (WAC 173-166) 01/02/2018

This is proposed rule language for WAC 173-166 Emergency Drought Relief

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-166-01-02-2

Rulemaking Proposal (WAC 173-201A) 01/08/15

This is a rulemaking proposal (CR-102) for WAC 173-201A Water quality standards for surface waters of the state of Washington.

https://ecology.wa.gov/rulemaking-proposal-wac-173-201a-01-08-15

Rulemaking proposed language (WAC 173-50) 4/19/23

This is proposed rule language for WAC 173-50.

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-50-4-19-23

Rulemaking Announcment 12-03 (WAC 173-201A) 9/13/12

This is a rulemaking announcement (CR-101) for WAC 173-201A Water quality standards for surface waters of the state of Washington.

https://ecology.wa.gov/rulemaking-announcment-12-03-wac-173-201a-9-13-1

Rulemaking Announcement (WAC 173-557) 01/21/14

This is a rulemaking announcement (CR-101) for WAC 173-557 Water Resources Management Program (WRMP) for the Spokane River and Spokane Valley Rathdrum Prairie (SVRP) Aquifer and amendment to WAC 173-555-010.

https://ecology.wa.gov/rulemaking-announcement-wac-173-557-01-21-14

Rulemaking proposal (WAC 173-230) 03/12/19

This is a rulemaking proposal (CR-102) for WAC 173-230 Wastewater Operator Certification

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-230-03-12-1

Rulemaking Announcement 11-08 (WAC 173-201A) 9/13/12

This is a rulemaking announcement (CR-101) for WAC 173-201A Water quality standards for surface waters of the state of Washington.

https://ecology.wa.gov/rulemaking-announcement-11-08-wac-173-201a-9-13

Rulemaking Announcement (WAC 173-455) 09-23-21

This is a rulemaking announcement (CR-101) for Chapter 173-455 WAC, Air Quality Fee Rule.

https://ecology.wa.gov/rulemaking-announcement-wac-173-455-09-23-21

Rulemaking proposed language (WAC 173-230) 03/12/19

This is proposed rule language for WAC 173-230

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-230-03-1

Rulemaking Proposal (WAC 173-557) 09/17/14

This is a rulemaking proposal (CR-102) for WAC 173-557 Water Resources Management Program (WRMP) for the Spokane River and Spokane Valley Rathdrum Prairie (SVRP) Aquifer and amendment to WAC 173-555-010.

https://ecology.wa.gov/rulemaking-proposal-wac-173-557-09-17-14

Rulemaking proposed language (WAC 173-555) 09/17/14

This is proposed rule language for amendment to WAC 173-555 Water Resources Program in the Little Spokane River basin, WRIA 55.

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-555-09-17-1

Rulemaking proposed language (WAC 173-557) 09/17/14

This is proposed rule language for WAC 173-557 Water Resources Management Program (WRMP) for the Spokane River and Spokane Valley Rathdrum Prairie (SVRP) Aquifer.

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-557-09-17-1

Rulemaking Proposal (WAC 173-360; WAC 170-360A) 01/24/18

This is a rulemaking proposal (CR-102) for WAC 173-360; WAC 173-360A, Underground Storage Tank (UST) Regulations.

https://ecology.wa.gov/rulemaking-proposal-wac-173-360;-wac-170-360a-01