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.
Publication: Hydrofluorocarbons Adopted Rule Language – Informational Guidebook
This guidebook is supplemental and is intended to provide general information to stakeholders about the Chapter 173-443 WAC Hydrofluorocarbons (HFCs) and Other Fluorinated Greenhouse Gases rule language and how it may affect them.
https://ecology.wa.gov/publication-hydrofluorocarbons-adopted-rule-language-informational-guidebook
WAC 173-50: Accreditation of Environmental Laboratories
This is the rulemaking page for Chapter 173-50 WAC.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-50
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
Better Brakes Law: Guidance for manufacturers
Guidance for manufacturers on Washington's Better Brakes regulations.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/better-brakes-guidance
Checklists and templates for site investigation reports and cleanup plans
Get help preparing remedial investigations, feasibility studies, and cleanup action plans.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/cleanup-report-checklists-and-templates
Dam construction & modification guidance
We provide guidance and technical notes for dam construction and modification.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/dam-construction-modification-guidance
Dam operation & maintenance guidance
We provide guidance to assist dam owners with operations and maintenance.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/dam-operation-maintenance-guidance
Dangerous waste guidance
Businesses in Washington that generate dangerous waste must follow the Dangerous Waste Regulations.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/dangerous-waste-guidance
E-Cycle WA guidance and reports
This page includes E-Cycle WA frequently asked questions and annual reports.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/electronics-ecycle-guidance-and-reports
Buying green — sustainable purchasing
Guidance for state agencies, local governments, and businesses on how to buy green products.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/green-purchasing
Cannabis licensing and the environment
Environmental permits may be required for cannabis growers and processors.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/guidance-for-cannabis-businesses
Frequently flooded areas: Critical Areas Ordinance
Frequently flooded areas are covered by Critical Areas Ordinances promoting safety from floods.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/guidance-for-floodplains-critical-areas-ordinanc
Online cleanup guide for homeowners and small businesses
An online cleanup guide for homes and small business properties that might be contaminated.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/guidance-for-residential-cleanups
Information for air monitoring professionals
Standard procedures, quality assurance, and monitoring guidance for air monitoring professionals.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/information-for-air-monitoring-professionals
Learning from incidents and spills
We learn from incidents and spills through investigations and share what we learn with others.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/learning-from-incidents-and-spills
EPA guidance on managing moderate risk waste
U.S. Environmental Protection Agency regulatory guidance on common moderate risk waste topics.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/managing-moderate-risk-waste-guidance
Moderate risk waste facility guidance
Regulatory information and guidance for county moderate risk waste facilities.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/moderate-risk-waste-facility-guidance
Municipal water law
We help regulate municipal water suppliers to ensure a safe and reliable drinking water supply.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/municipal-water-law
Pollution prevention services for businesses
Pollution prevention resources and technical assistance for businesses in Washington.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/pollution-prevention-services
Bunkering requirements for ships
Learn about best practices and rules that promote safe, spill-free fuel loading in Washington waters.
https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/requirements-for-bunkering
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