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 173-400) 10/25/18

This is adopted rule language for Chapter 173-400 WAC, General Regulations for Air Pollution Sources.

https://ecology.wa.gov/adopted-rule-language-wac-173-400-10-25-18

Adopted rule language (WAC 173-400) 08/16/18

This is adopted rule language for Chapter 173-400 WAC, General Regulations for Air Pollution Sources.

https://ecology.wa.gov/adopted-rule-language-wac-173-400-08-16-18

Adopted rule language (WAC 173-182) 12/18/19

This is adopted rule language for WAC 173-182 , Oil Spill Contingency Plan.

https://ecology.wa.gov/adopted-rule-language-wac-173-182-dec

Adopted Rule Language (WAC 173-201A) 12/30/19

This is adopted rule language for WAC 173-201A Water Quality Standards for Surface Waters of the State of Washington

https://ecology.wa.gov/adopted-rule-language-wac-173-201a-12-30-19

Adopted rule language (WAC 173-219)

This is adopted rule language for WAC 173-219 Reclaimed Water

https://ecology.wa.gov/adopted-rule-language-wac-173-219-01-23-18

Adopted Rule Language (WAC 173-224) 06/22/21

This is adopted rule language for WAC 173-224 Water Quality Permit Fees

https://ecology.wa.gov/adopted-rule-language-wac-173-224-06-22-21

Adopted rule language (WAC 173-400) 11/29/21

This is adopted rule language for WAC 173-400, General Regulations for Air Pollution Sources.

https://ecology.wa.gov/adopted-rule-language-wac-173-400-11-29-21

Adopted rule language (WAC 173-201A) 09/17/21

This is adopted rule language for WAC 173-201A Water Quality Standards for Surface Waters of the State of Washington

https://ecology.wa.gov/adopted-rule-language-wac-173-201a-09-17-21

Adopted rule language (WAC 173-201A) 03/22/22

This is adopted rule language for WAC 173-201A Water Quality Standards

https://ecology.wa.gov/adopted-rule-language-wac-173-201a-03-22-22

Adopted rule language (WAC 173-400) 12/19/22

This is adopted rule language for WAC 173-400, General Regulations for Air Pollution Sources.

https://ecology.wa.gov/adopted-rule-language-wac-173-400-12-19-22

Adopted rule language (WAC 173-230) 07/10/19

This is adopted rule language for WAC 173-230 Certification of Wastewater Operators

https://ecology.wa.gov/adopted-rule-language-wac-173-230-07-10-19

Adopted rule language (WAC 173-185) 02/02/21

This is adopted rule language for WAC 173-185 Oil Movement by Rail and Pipeline Notification

https://ecology.wa.gov/adopted-rule-language-wac-173-185-02-02-21

Adopted rule language (WAC 173-360; WAC 173-360A) 07/17/18

This is the adopted rule language for WAC 173-360; WAC 173-360A, Underground Storage Tank (UST) Regulations.

https://ecology.wa.gov/adopted-rule-language-wac-173-360;-wac-173-360a

Adopted rule language (WAC 173-337) 05/31/23

This is adopted rule language for WAC 173-337 Safer Products Restrictions and Reporting

https://ecology.wa.gov/asset-collections-doc-assets-rulemaking-hwtr-wac173-337_-21-01-cr-103-adopted-rule-language-wac-173

Adopted rule language (WAC 173-340) 08/23/23

This is adopted rule language for WAC 173-340, Model Toxics Control Act (MTCA) Cleanup Regulations.

https://ecology.wa.gov/adopted-rule-language-wac-173-340-08-23-23

Adopted rule language (WAC 173-360A) 09/--/23

This is adopted rule language for WAC 173-360A, Underground Storage Tank (UST) Regulations.

https://ecology.wa.gov/adopted-rule-language-wac-173-360a-09-23

Adopted rule language (WAC 173-201A) 12/18/23

This is adopted rule language for WAC 173-201A Water Quality Standards for Surface Waters of the State of Washington

https://ecology.wa.gov/adopted-rule-language-wac-173-201a-12-18-23

Adopted rule language (WAC 173-187) 6/14/24

This is adopted rule language for WAC 173-187 Financial Responsibility

https://ecology.wa.gov/adopted-rule-language-wac-173-187-6-14-24

Adopted rule language (WAC 173-201A) 08/14/24

This is adopted rule language for WAC 173-201 Water Quality Standards for Surface Waters of the State of Washington

https://ecology.wa.gov/adopted-rule-language-wac-173-201a-08-14-24

Adopted Rule Language (WAC 173-201A) 11/14/24

This is adopted rule language for WAC 173-201A Water Quality Standards for Surface Waters of the State of Washington

https://ecology.wa.gov/adopted-rule-language-wac-173-201a-11-14-24