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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Spill prevention inspections for facilities
We inspect oil facilities to provide technical assistance and ensure rule compliance.
Overview of compliance & enforcement at Ecology
View the compliance and enforcement authority we have, and what actions we have recently taken.
Pre-booming, alternative measures, and equivalent compliance
Oil-transfer operations must include protective measures to contain potential spills.
Spill enforcement
Spills into water harm the environment, violate state law, and may result in a penalty.
TransAlta power plant agreement
The TransAlta agreement reduces harmful air pollutants from the state's only coal-fired power plant.
Underground storage tank closures
Important information about closing your underground storage tanks.
Inspecting ships for substantial risks
We inspect ships operating in state waters and take further action if they pose a substantial risk.
Water use compliance and enforcement
Enforcing water use laws reduces conflict among competing water users and protects the resource.
Columbia River water use compliance
Our watermaster seeks to ensure water is legally available when out-of-stream users and the environment need it.
Clean Air Rule Baseline Establishment Order 15500
The Clean Air Rule baseline order for the Tesoro Refining & Marketing CO LLC.
Clean Air Rule Baseline Establishment Order 15501
The Clean Air Rule baseline order for Shell Puget Sound Refinery.
Clean Air Rule Baseline Establishment Order 15511
The Clean Air Rule baseline order for US Oil and Refining Co.
Clean Air Rule Baseline Establishment Order 15521
The Clean Air Rule baseline order for Philips 66 Ferndale Refinery.
Clean Air Rule Baseline Establishment Order 15525
The Clean Air Rule baseline order for Puget Sound Energy Mint Farm Generating Station.
Clean Air Rule Baseline Establishment Order 15526
The Clean Air Rule baseline order for PacifiCorp Chehalis Generating Facility.
Clean Air Rule Baseline Establishment Order 15531
The Clean Air Rule baseline order for Gas Transmission NW Compressor Station 8
Clean Air Rule Baseline Establishment Order 15513
The Clean Air Rule baseline order for King County Solid Waste Cedar Hills Landfill
Clean Air Rule Baseline Establishment Order 15515
The Clean Air Rule baseline order for Enwave Seattle
Clean Air Rule Baseline Establishment Order 15516
The Clean Air Rule baseline order for Sumas CS
Clean Air Rule Baseline Establishment Order 15517
The Clean Air Rule baseline order for Cowlitz County Headquarters Landfill.
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