Order from United State District Court Northern District of California that remands and vacates the 2020 Section 401 rule under the Clean Water Act.

Printable and accessible PDF version of a flowchart showing the approval process for Quality Assurance Project Plans for National Estuary Program grantees.

This table describes the required elements, documents, and actions to submit your certification request to the Department of Ecology.

Under the Clean Water Act, we help make sure projects, actions, and activities don't harm state waters.

Every five years, states and territories are encouraged to conduct self-assessments of their coastal management programs to determine problems and enhancement opportunities within each of the nine enhancement areas—and to assess the effectiveness of existing management efforts to address identified problems.

An illustrated guide to some of the more common freshwater aquatic plants found in Washington, such as hydrilla, milfoil, pondweeds, bladderworts, and more.

This is the Applicant Prep Tool document for people applying for funding via a Water Quality Combined funding program application in EAGL.

This is the Applicant Prep Tool document for people applying for funding via a Water Quality Combined (specifically stormwater projects) funding program application in EAGL.

For funding recipients of our Water Quality Combined Funding Program, this is the resources list for the Recipient Training workshop.

This is the announcement and detailed information for the Water Quality Combined funding program's State Fiscal Year 2023 Applicant Workshop for anyone wanting to apply for loan or grant funding from the Water Quality Combined funding program in this next application cycle.

We review projects needing federal approval to assure compliance with state water quality standards.

Access to discrete and time-series environmental data for air, water, soil, sediment, aquatic animals, and plants.

Find information on facilities and sites of interest to Ecology.

Look up industrial section permits with hyperlinks to all documents currently available electronically. You can view active or proposed permits and associated documents:

Look up contact information for Ecology staff, by last name. Includes e-mail, phone, fax and location.

Look up contact information for Ecology staff, by subject topic. Includes e-mail, phone, fax and location.

This is the gateway to Ecology's many web-accessible databases and tools.

Regulatory fairness act

Growth management planning by selected counties and cities

Department of Ecology