Oregon is home to 15 sites on the EPA’s National Priorities List. The EPA’s National Priorities List currently includes 15 active NPL sites in Oregon, with 21 total entries when proposed and deleted sites are included. The most hazardous site has an HRS score of 71.78 out of a maximum of 100. 1 additional site is proposed for the NPL and awaiting final listing. 5 sites have been cleaned up and removed from the list. The interactive map below shows all NPL sites in Oregon – click any marker for site details, HRS score, and a link to the EPA’s site profile.
Superfund Statistics for Oregon
| Category | Count |
|---|---|
| Active NPL Sites | 15 |
| Proposed NPL Sites | 1 |
| Deleted (cleaned up) | 5 |
| Total NPL Entries | 21 |
| Highest HRS Score | 71.78 |
| Average HRS Score (active) | 48.6 |
| EPA Region | Region 10 |
Highest-Risk Superfund Sites in Oregon
The table below lists the active NPL sites in Oregon sorted by Hazard Ranking System (HRS) score. The HRS is a 0-100 scale used by the EPA to assess the potential threat to human health and the environment. Sites scoring 28.50 or above qualify for NPL listing.
| Site Name | City / County | HRS Score | EPA ID |
|---|---|---|---|
| Taylor Lumber and Treating | Sheridan, Yamhill | 71.78 | ORD009042532 |
| Reynolds Metals Company | Troutdale, Multnomah | 70.71 | ORD009412677 |
| Teledyne Wah Chang | Albany, Linn | 54.27 | ORD050955848 |
| Northwest Pipe & Casing/Hall Process Co | Clackamas, Clackamas | 51.09 | ORD980988307 |
| Black Butte Mine | Cottage Grove, Lane | 50.00 | OR0000515759 |
| Formosa Mine | Riddle, Douglas | 50.00 | ORN001002616 |
| Bradford Island | Cascade Locks, Multnomah | 50.00 | ORSFN1002228 |
| McCormick & Baxter Creosoting Co. (Portland Plant) | Portland, Multnomah | 50.00 | ORD009020603 |
| Fremont National Forest/White King and Lucky Lass Uranium Mines (USDA) | Lake County, Lake | 50.00 | OR7122307658 |
| Portland Harbor | Portland, Multnomah | 50.00 | ORSFN1002155 |
| Union Pacific Railroad Co. Tie-Treating Plant | The Dalles, Wasco | 37.93 | ORD009049412 |
| J. H. Baxter | Eugene, Lane | 31.70 | ORD009032400 |
| Umatilla Army Depot (Lagoons) | Hermiston, Morrow | 31.31 | OR6213820917 |
| United Chrome Products, Inc. | Corvallis, Benton | 31.07 | ORD009043001 |
| North Ridge Estates | Klamath Falls, Klamath | N/A | ORN001002476 |
Superfund Cleanup Progress in Oregon
Oregon has made measurable progress on Superfund cleanup: 5 sites have been fully remediated and removed from the National Priorities List. The remaining 15 active sites are at various stages of investigation and cleanup. EPA cleanup timelines vary widely depending on contamination type, site complexity, and the availability of responsible parties to fund remediation.
About the Superfund Program in EPA Region 10
The Superfund program, formally known as the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), gives the EPA authority to clean up contaminated sites that pose risks to public health or the environment. Sites are assessed using the Hazard Ranking System (HRS) – a score of 28.50 or above triggers NPL listing and formal cleanup proceedings. Oregon falls under EPA Region 10, which coordinates Superfund investigations, cleanups, and community engagement for the region.
Frequently Asked Questions
How many Superfund sites are in Oregon?
Oregon has 15 active sites on the EPA National Priorities List, plus 1 proposed site awaiting final listing. Including sites that have been cleaned up and removed, the total NPL count for Oregon is 21.
What is the most contaminated Superfund site in Oregon?
Based on HRS score, the highest-risk active Superfund site in Oregon is Taylor Lumber and Treating near Sheridan, with an HRS score of 71.78. The HRS score reflects the site’s potential to harm human health or the environment through groundwater, surface water, soil, or air pathways.
How does the EPA decide which sites go on the Superfund list?
The EPA uses the Hazard Ranking System to score sites based on the likelihood of a release, the characteristics of the waste, and the people or environments that could be affected. Sites scoring 28.50 or higher are eligible for the National Priorities List. Once listed, sites become eligible for federally funded cleanup or enforcement against responsible parties under CERCLA.
Superfund Sites in Nearby States
Explore Superfund data for states bordering Oregon: California, Idaho, Nevada, Washington. For a national overview, see the US Superfund Sites map.
