Dawson County, MT
The federal environmental record for Dawson County (population 8,810): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
0
Superfund NPL sites
0
federal cleanup sites
0
PFAS-detecting water systems
1
TRI facilities
33
open tank releases
Drinking water: PFAS testing
No public water system serving Dawson 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)
1 facilities in Dawson filed TRI reports for 2024, totalling 719 lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| THATCHER CO OF NORTH DAKOTA INC | GLENDIVE | Methanol | 719 lb |
Underground fuel tanks
EPA's UST Finder records 85 tank facilities in Dawson: 37 tanks in service and 186 closed. 87 fuel releases are on record, of which 33 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Dawson 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 - $39