Stillwater County, MT
The federal environmental record for Stillwater County (population 9,173): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
1
Superfund NPL sites
3
federal cleanup sites
0
PFAS-detecting water systems
3
TRI facilities
16
open tank releases
Superfund NPL sites
| Site | City | Status | Listed |
|---|---|---|---|
| Mouat Industries | Columbus | on the NPL | 06/10/1986 |
Drinking water: PFAS testing
No public water system serving Stillwater 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)
3 facilities in Stillwater filed TRI reports for 2024, totalling 842k lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| SMC NYE MINE SITE | NYE | Nickel And Nickel Compounds, Methanol | 835k lb |
| MONTANA SILVERSMITHS | COLUMBUS | Dichloromethane | 6k lb |
| SMC PRECIOUS METALS SMELTER & BASE METALS REFINERY | COLUMBUS | Nickel And Nickel Compounds, Copper And Copper Compounds | 413 lb |
Underground fuel tanks
EPA's UST Finder records 51 tank facilities in Stillwater: 41 tanks in service and 113 closed. 56 fuel releases are on record, of which 16 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Stillwater 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 Stillwater, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- MOUAT INDUSTRIESCOLUMBUS
- PARK CITY SCHOOLPARK CITY
- STILLWATER TRAIN DERAILMENTREED POINT