Thurston County, WA
The federal environmental record for Thurston County (population 299,003): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
1
Superfund NPL sites
4
federal cleanup sites
3
PFAS-detecting water systems
5
TRI facilities
64
open tank releases
Superfund NPL sites
| Site | City | Status | Listed |
|---|---|---|---|
| Palermo Well Field Ground Water Contamination | Tumwater | on the NPL | 04/01/1997 |
Drinking water: PFAS testing
Public water systems serving Thurston with at least one PFAS detection under UCMR5. The federal limit for PFOA and PFOS is 4 ng/L; EPA proposed in May 2026 to rescind the limits for the other compounds, which are shown for information.
| System | Highest results | Reading |
|---|---|---|
| OLYMPIA CITY OF WA5363450 | PFOS: 5.8 ng/L PFBS: 4.8 ng/L PFOA: 4.3 ng/L | above final limit |
| LACEY WATER DEPARTMENT WA5343500 | PFPeA: 18.8 ng/L PFHxA: 9.8 ng/L PFBS: 4.2 ng/L | detected |
| TUMWATER CITY OF WA5389700 | PFBS: 6.8 ng/L | detected |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
5 facilities in Thurston filed TRI reports for 2024, totalling 126k lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| CROWN BEVERAGE PACKAGING | OLYMPIA | Certain glycol ethers, n-Butyl alcohol | 102k lb |
| AQUATIC CO | YELM | Styrene | 15k lb |
| CARDINAL CG | TUMWATER | Zinc compounds | 9k lb |
| KLOECKNER METALS CORP | TUMWATER | Manganese, Nickel | 167 lb |
| CH2O INC | OLYMPIA | - | 0 lb |
Underground fuel tanks
EPA's UST Finder records 531 tank facilities in Thurston: 343 tanks in service and 1,157 closed. 71 fuel releases are on record, of which 64 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Thurston as Zone 3, the lowest predicted indoor radon (under 2 pCi/L average). Radon and air quality are covered in depth on lung.com.
The record for one specific address
County figures blur what matters: distance. The Address Environmental Report runs these same federal datasets against one address and reports every site, tank, polluter and water result around it, with distances, in about a minute.
Get the report - $39All federal cleanup sites on file
The wider Superfund enterprise inventory (SEMS) for Thurston, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- PALERMO WELLFIELDTUMWATER
- SALISH MERCURY SPILLLACEY
- US DOE BPA OLYMPIA SUBSTATIONOLYMPIA
- USDA USFS R06 PACIFIC NORTHWEST RESEARCH STATIONOLYMPIA