Summit County, CO
The federal environmental record for Summit County (population 30,465): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
0
Superfund NPL sites
1
federal cleanup sites
2
PFAS-detecting water systems
1
TRI facilities
7
open tank releases
Drinking water: PFAS testing
Public water systems serving Summit 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 |
|---|---|---|
| SNAKE RIVER WD CO0159105 | PFOS: 22 ng/L PFHxS: 13 ng/L PFPeA: 8 ng/L | above final limit |
| SILVERTHORNE TOWN OF CO0159095 | PFBS: 5.9 ng/L PFHxS: 3.7 ng/L | detected |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
1 facilities in Summit filed TRI reports for 2024, totalling 119 lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| PEAK SILVERTHORNE BATCH PLANT | SILVERTHORNE | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Lead | 119 lb |
Underground fuel tanks
EPA's UST Finder records 91 tank facilities in Summit: 100 tanks in service and 201 closed. 94 fuel releases are on record, of which 7 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Summit 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 Summit, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- PERU CREEK MINING DISTRICTKEYSTONE