Regulations & Permits

We oversee many state and federal laws designed to protect Washington's land, air, and water. Rules and regulations that direct state agencies, local governments, businesses, and others on how to comply with relevant laws are compiled in the Washington Administrative Code. See our laws, rules, & rulemaking page for more information about our current rules and rulemaking.
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Air quality monitoring network
Learn about the air monitoring network that measures local air quality conditions and see the map interface for near real-time data.
Online tools for cleaning up sites
We have online tools and statistical packages to help you clean up contaminated sites.
Rulemaking at Ecology
Find out about Ecology's rulemaking activities.
Determining if areas in Washington meet national air quality standards
Ecology determines whether areas in Washington meet national air quality standards.
Our air quality implementation plan
The State Implementation Plan is an overarching plan to keep air clean.
Water rights policies & procedures
Policies and procedures guide our water rights and water resources work.
Dam safety policies
Policies guide our dam safety work.
Spill response plans for Class 2 mobile facilities
We require Class 2 mobile oil-handling facilities in Washington to have a spill response plan.
Contingency planning for oil industry
Oil-handling operations must have contingency plans describing how they would respond to oil spills.
Policies and guidance for site cleanups
Policies and guidance interpret the MTCA cleanup law and help you clean up contaminated sites.
State Solid and Hazardous Waste Plan
Washington state’s management plan for solid waste and toxic materials.
Aquatic weed control technical assistance
We provide advice on identifying, monitoring, and managing invasive freshwater aquatic plants.
Best Achievable Protection for spill response
Best Achievable Protection (BAP) is training, operations, and technologies for successful responses.
Better Brakes Law - guidance for manufacturers
Guidance for manufacturers on Washington's Better Brakes regulations.
Biosolids permitting and forms
We issue permits and regulate biosolids production and use in Washington.
Contained-in determinations for contaminated soil and groundwater
This policy helps us determine how contaminated soil and groundwater is managed and disposed.
Dam operation & maintenance guidance
We provide guidance to assist dam owners with operations and maintenance.
Dangerous waste guidance
Businesses in Washington are required to follow the state Dangerous Waste Regulations.
E-Cycle WA guidance and reports
This page includes E-Cycle WA frequently asked questions and annual reports.
Empirical demonstrations under MTCA
Empirical demonstrations can show that applicable groundwater cleanup levels aren’t being exceeded.
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