Sweetwater County, WY
The federal environmental record for Sweetwater County (population 41,249): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
0
Superfund NPL sites
2
federal cleanup sites
0
PFAS-detecting water systems
7
TRI facilities
52
open tank releases
Drinking water: PFAS testing
No public water system serving Sweetwater reported a PFAS detection in the UCMR5 national testing round. Systems serving under 3,300 people were only sampled in part, so absence from this table is not proof of absence in the water.
Facilities reporting toxic releases (2024)
7 facilities in Sweetwater filed TRI reports for 2024, totalling 3.8M lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| SIMPLOT PHOSPHATES LLC | ROCK SPRINGS | Hydrogen fluoride, Chromium compounds (except for chromite ore mined in the Transvaal Region) | 2.4M lb |
| BLACKS FORK GAS PLANT | GRANGER | Methanol, Toluene | 964k lb |
| PACIFICORP JIM BRIDGER PLANT & BRIDGER COAL CO | POINT OF ROCKS | Barium And Barium Compounds, Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 422k lb |
| VERMILLION GAS PLANT | ROCK SPRINGS | n-Hexane, Toluene | 25k lb |
| CHURCH & DWIGHT CO INC | GREEN RIVER | 1,3,4,6,7,8-Hexahydro-4,6,6,7,8,8-hexamethylcyclopenta[g]-2-benzopyran | 92 lb |
| P4 PRODUCTION LLC | ROCK SPRINGS | Lead And Lead Compounds, Mercury And Mercury Compounds | 28 lb |
| SUNROC CORP - LAGOON DRIVE READY MIX | ROCK SPRINGS | Lead | 0 lb |
Underground fuel tanks
EPA's UST Finder records 297 tank facilities in Sweetwater: 171 tanks in service and 698 closed. 165 fuel releases are on record, of which 52 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Sweetwater as Zone 1, the highest predicted indoor radon levels (over 4 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 Sweetwater, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- BLM-BAROIL LANDFILLBAROIL
- ROCK SPRINGS OIL RETORT PROJECTROCK SPRINGS