Site Register & contaminated sites lists
Updated Model Toxics Control Act Cleanup Regulations went into effect Jan. 1, 2024
Starting in 2024, we will no longer maintain the Hazardous Sites List (HSL). The HSL was a ranked subset of sites on our Confirmed and Suspected Contaminated Sites List, which is now called the Contaminated Sites List (CSL). The HSL is no longer necessary because we will be able to rank all sites on the CSL using our new Site Hazard Assessment and Ranking Process (SHARP).
Learn more about the changes to the Model Toxics Control Act Cleanup Regulations.
On this page you can find our:
- Site Register — Information about formal and independent cleanups, including opportunities for public comment and attending public meetings, and policy updates.
- Hazardous Sites List — Updates on sites that have been assessed and ranked, as well as National Priorities List sites.
- Cleanup and Tank Search — A database with a variety of customizable reports about cleanup and underground storage tank sites.
The Site Register is a newsletter we publish about every two weeks. It contains information about cleanup activities, public meetings, public comment periods, and policy and rule changes.
We aim to provide timely information about contaminated site cleanups and opportunities for you to participate in that process. We use the Site Register as one way to meet this goal. For more information contact Sarah Kellington (360-280-3167, Sarah.Kellington@ecy.wa.gov) or read the Site Register Focus Sheet.
Cleanup and Tank Search is intended to help you quickly retrieve site information, reports, and data. You can search for a specific site or find all the sites that meet certain criteria, like all the sites in a county or with a particular contaminant. You can also share your results and export them to excel, csv, json, and xml formats.
Cleanup site information
All cleanup sites in Washington state provides information on current and former cleanup sites. Click the a site name to visit the cleanup site webpage, or download the Site Details Report or available site documents directly from the search results page. You can filter by county, contaminant, site status, and whether or not the site is in the Voluntary Cleanup Program or has institutional controls, and export your results.
There are also pre-filtered subsets of the statewide list available:
- Confirmed and Suspected Contaminated Sites
All sites that are undergoing cleanup, or awaiting further investigation or cleanup.
- No Further Action sites
These sites were on the Confirmed and Suspected Contaminated Sites List and have received a No Further Action (NFA) decision.
For more information on environmental covenants, brownfields, and leaking underground storage tanks, use these specialized lists:
- Brownfields Sites
Brownfields are properties that are abandoned or underused because they may be contaminated. This list shows sites that have received public brownfields funding, and the amount of funding received.
- Environmental Covenants Registry
Some sites have 'institutional controls' that restrict use of the property to protect people from exposure to contamination or maintain the integrity of the cleanup. For example, a covenant might prohibit drilling a well or using the property for homes. You can filter this list by type of restriction and legal mechanism.
- Leaking Underground Storage Tanks List
Information on underground storage tank (UST) facilities that have required cleanup.
Underground storage tank information
The Regulated USTs list provides information about active and closed Underground Storage Tanks. You can search by ID, tag number, or site name, and filter by tank status, stored substance, or county. Each result includes a link to the UST System Summary Report.
Voluntary Cleanup Program (VCP) wait lists
The Voluntary Cleanup Program proivdes technical assistance to people cleaning up sites independently. In some regions there are waitlists due to Ecology staff capacity.