San Miguel County, CO
The federal environmental record for San Miguel County (population 7,868): 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
1
PFAS-detecting water systems
0
TRI facilities
1
open tank releases
Drinking water: PFAS testing
Public water systems serving San Miguel 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 |
|---|---|---|
| MOUNTAIN VILLAGE TOWN OF CO0157400 | PFHxS: 8.1 ng/L PFOS: 7.5 ng/L | above final limit |
On a system with detections? Testing and treatment options
Underground fuel tanks
EPA's UST Finder records 36 tank facilities in San Miguel: 15 tanks in service and 63 closed. 13 fuel releases are on record, of which 1 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps San Miguel 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 San Miguel, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- BLM-SAN MIGUEL LANDFILL #2SLICK ROCK
- BLM-SAWPIT TRAM SITE (ORE STORAGE)SAWPIT