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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Public input and events listing
Information on Ecology's public hearings, meetings, workshops, open houses, and open comment periods.
Ecology's blog
Our blog posts tell how Ecology works to protect Washington’s environment and quality of life. We strive to promote the wise management of our air, land and water for the benefit of current and future generations.
Clean Water Act — Section 401 Water Quality Certifications
Under the Clean Water Act, we make decisions about hydropower licenses and non-hydropower projects.
Water Quality Combined - Recipient Training - Contacts List
For funding recipients of our Water Quality Combined Funding Program, this is the list of contacts associated to the Recipient Training workshop.
401 Water Quality Certifications for non-hydropower permits
We review projects needing federal approval to assure compliance with state water quality standards.
Freshwater Aquatic Plants Manual
An illustrated guide to some of the more common freshwater aquatic plants found in Washington, such as hydrilla, milfoil, pondweeds, bladderworts, and more.
Public Notices for Section 401 water quality certifications & CZM federal consistency
View current public notices for statewide projects seeking Section 401 water quality certification and Coastal Zone Management approval.
Section 401 water quality & CZM federal consistency decisions
See our recent decisions on Section 401 water quality and CZM federal consistency.
Water Quality Combined funding program State Fiscal Year 2020 Applicant Workshop Notice
This is the announcement and detailed information for the Water Quality Combined funding program's Fiscal Year 2020 Applicant Workshop for anyone wanting to apply for loan or grant funding from the Water Quality Combined funding program in this next application cycle.
Water Quality Combined funding program - Recipient Training - Resources List
For funding recipients of our Water Quality Combined Funding Program, this is the resources list for the Recipient Training workshop.
Applicant Prep Tool for Water Quality Combined Funding Applications in EAGL
This is the Applicant Prep Tool document for people applying for funding via a Water Quality Combined funding program application in EAGL.
Environmental Information Management System (EIM) - search data
Access to discrete and time-series environmental data for air, water, soil, sediment, aquatic animals, and plants.
Environmental Assessment Program
Learn about Ecology's scientific research and services.
Scientific services
We offer scientific services to support environmental work and inquiry for projects funded through public dollars. We provide accurate, credible, and defensible analyses using the latest accredited methods.
Rulemaking at Ecology
Ecology has delegated federal and state authority to implement and enforce various environmental laws and rules. We accomplish this through our open and public rulemaking process.
Online tools & databases
This is the gateway to Ecology's many web-accessible databases and tools.
Facility/Site database
Look up information on facilities and sites of interest to the Department of Ecology.
Ecology subject referral directory
Look-up contact information for Ecology staff, by subject topic. Includes e-mail, phone, fax and location.
Industrial Permits - look-up tool
Look up industrial section permits with hyperlinks to all documents currently available electronically. You can view active or proposed permits and associated documents:
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