UST Check → counties → Colorado → Adams
Underground storage tanks & leak sites in Adams County, CO
Every figure below is from EPA UST Finder — the EPA-compiled national registry of state-reported underground storage tanks — county aggregates as published by EPA.
880registered tank facilities
624open tanks
1,984closed tanks
719leak incidents on record
50cleanups still open
50 leak cleanups in
Adams County are still open — the state has not closed the case.
An open cleanup near a property you're buying or lending on is a findable, checkable fact: it appears in a
per-address screen with distance and the registry record.
Largest registered facilities
By open-tank count, from the facility-level registry. Every fact is attributed to the EPA record (linked ID); something wrong — use the correction path in the footer and we'll fix or remove it promptly.
| Facility | City | Open / closed tanks | Status | EPA record |
|---|---|---|---|---|
| Sapp Brothers Truck Stop | Commerce City | 8 / 23 | Open UST(s) | CO8971 |
| Wagner Equipment Co/ Main | Aurora | 8 / 8 | Open UST(s) | CO3658 |
| Wagner Equipment Rental Building | Aurora | 7 / 0 | Open UST(s) | CO15674 |
| Public Service Company of CO Material Dist Center | Henderson | 7 / 0 | Open UST(s) | CO1537 |
| Stinker Store #334 | Aurora | 6 / 1 | Open UST(s) | CO11005 |
| Denver East Travel Center | Commerce City | 6 / 0 | Open UST(s) | CO15022 |
| UPS Denver Hub | Commerce City | 5 / 17 | Open UST(s) | CO168 |
| Riggi Oil Co | Commerce City | 5 / 6 | Open UST(s) | CO8238 |
Open leak cleanups — most recently reported
| Site | City | Reported | Substance | EPA record |
|---|---|---|---|---|
| Sapp Brothers Truck Stop | Commerce City | 2018-05-23 | — | CO13035 |
| Loves Travel Stop #300 | Bennett | 2018-05-04 | — | CO13017 |
| 7-Eleven #25325 | Westminster | 2018-03-20 | — | CO12975 |
| Aurora Sunmart | Aurora | 2017-11-01 | — | CO12877 |
| Y Mart Gas And Groceries | Northglenn | 2017-10-13 | — | CO12860 |
| 7-Eleven #24856 | Thornton | 2017-08-22 | — | CO12825 |
What this means if you're buying or lending here
- "Closed" ≠ clean. A closed tank was taken out of service per the registry — many were closed without soil testing, especially before the late 1990s.
- The registry is incomplete by design. Tanks removed before 1986 and most residential heating-oil tanks were never registered. A county with 880 registered facilities has an unknown number of unregistered ones.
- Open cleanups are the headline. 50 cases in this county are still open; contamination may still be under investigation or remediation — distance from a specific parcel is what matters, and that's a per-address question.
Screen a specific property
This page covers the county. A purchase or loan decision needs the registry around one address: registered tanks at the parcel, every facility within 500 and 1,500 ft, leak cleanups with status and distance — each line cited to the official record.
Screen an address — $49 How it worksThis is a screen of EPA-registered tank and leak records, not an environmental site assessment. State registries are incomplete by design: tanks removed before 1986 and most residential heating-oil tanks were never registered, so a clean screen cannot prove the absence of a tank. "Closed" means a tank was taken out of service per the registry — it does not certify that no contamination remains.
source: EPA UST Finder EPA data vintage 2024-12-04 computed 2026-06-12