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.
RCW Chapter 90.50A
Water pollution control facilities federal capitalization grants
https://ecology.wa.gov/rcw-chapter-90-50a
WAC Chapter 173-303
Dangerous waste regulations
https://ecology.wa.gov/wac-chapter-173-303-3d9899805a920fa45a9286be0d1f7ab7
Public comments: Chambers Creek Regional Wastewater Treatment Plant Draft Permit
We invite your comments on the draft NPDES permit for the Chambers Creek Wastewater Treatment Plant – WA0039624.
https://ecology.wa.gov/chamberscreekcomment
Publication: Criteria for Sewage Works Design (Orange Book)
A guide for the design of sewage collection, treatment, and reclamation systems, for municipal wastewater collection and treatment facilities.
https://ecology.wa.gov/publication-criteria-for-sewage-works-design-orange-book
Online tool: Emergence guidance for stormwater management
Guidance in the 2024 Stormwater Management Manual for Western Washington
https://ecology.wa.gov/online-tool-emergence-guidance-for-stormwater-management
Publication: Stormwater treatment of tire contaminants – best management practices effectiveness
Study assessing which stormwater best management practices (BMPs) are expected to reduce concentrations of 6PPD and 6PPD-q in stormwater.
https://ecology.wa.gov/publication-stormwater-treatment-of-tire-contaminants-best-management-practices-effectiveness
Aquatic weed control technical assistance
We provide advice on identifying, monitoring, and managing invasive freshwater aquatic plants.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/aquatic-weed-control-technical-assistance
Washington's biosolids permit system
Help for operators with permit applications, and those managing permit coverage, including modifications.
https://ecology.wa.gov/regulations-permits/permits-certifications/biosolids-permit-system
Boatyard General Permit
This permit protects marine waters from toxics that can get into stormwater runoff from boatyards.
https://ecology.wa.gov/regulations-permits/permits-certifications/boatyard-general-permit
Bridge & Ferry Terminal Washing Permit
This permit protects water from cleaning and painting activities at bridges and ferry terminals.
https://ecology.wa.gov/regulations-permits/permits-certifications/bridge-and-ferry-terminal-washing-permit
Certified Erosion & Sediment Control Lead
Find a Certified Erosion & Sediment Control Lead or learn how to become one.
https://ecology.wa.gov/regulations-permits/permits-certifications/certified-erosion-sediment-control
Concentrated Animal Feeding Operation General Permit
Permit for operations with large numbers of livestock for long periods of time.
https://ecology.wa.gov/regulations-permits/permits-certifications/concentrated-animal-feeding-operation
Combined sewer overflows
We're working to control combined sewer overflows to keep water clean.
https://ecology.wa.gov/regulations-permits/permits-certifications/combined-sewer-overflows
EPA Vessel General Permit
Find out about the EPA Vessel General Permit and tap into helpful resources.
https://ecology.wa.gov/regulations-permits/permits-certifications/epa-vessel-general-permit-graywater
Fresh Fruit Packing General Permit
Find out about the Fresh Fruit Packing General Permit and get helpful resources.
https://ecology.wa.gov/regulations-permits/permits-certifications/fresh-fruit-packing-general-permit
Environmental laboratory accreditation
Learn how we accredit environmental laboratories and where to find them.
https://ecology.wa.gov/regulations-permits/permits-certifications/laboratory-accreditation
Mineral prospecting and placer mining
Information from Ecology and WDFW about mineral prospecting and placer mining, and ESHB 1261.
https://ecology.wa.gov/regulations-permits/permits-certifications/mineral-prospecting-and-placer-mining
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