UST Check → counties → Colorado → Jefferson
Underground storage tanks & leak sites in Jefferson 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.
847registered tank facilities
623open tanks
1,788closed tanks
817leak incidents on record
65cleanups still open
65 leak cleanups in
Jefferson 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 |
|---|---|---|---|---|
| Denver West Auto/Truck Plaza | Wheat Ridge | 6 / 2 | Open UST(s) | CO10912 |
| City of Lakewood Fleet Management | Lakewood | 5 / 8 | Open UST(s) | CO9069 |
| Lakeside Gas | Wheat Ridge | 5 / 0 | Open UST(s) | CO10569 |
| Twin Star Energy #537 | Littleton | 4 / 5 | Open UST(s) | CO10401 |
| CST Metro LLC DBA Corner Store #4113 | Golden | 4 / 5 | Open UST(s) | CO6796 |
| 32nd & Wadsworth Conoco | Wheat Ridge | 4 / 4 | Open UST(s) | CO6754 |
| 7-Eleven #39274 | Lakewood | 4 / 4 | Open UST(s) | CO7946 |
| Alameda Crossing 66 | Lakewood | 4 / 4 | Open UST(s) | CO2351 |
Open leak cleanups — most recently reported
| Site | City | Reported | Substance | EPA record |
|---|---|---|---|---|
| My Goods Market #6548 | Morrison | 2018-08-22 | — | CO13115 |
| 7-Eleven #27429 | Lakewood | 2018-08-21 | — | CO13128 |
| Jewell Gas Express | Lakewood | 2018-08-16 | — | CO13110 |
| Circle K Store #2709870 | Wheat Ridge | 2018-07-06 | — | CO13072 |
| Green Mountain Shell | Lakewood | 2018-05-15 | — | CO13027 |
| Brads Conoco | Lakewood | 2018-03-24 | — | CO12981 |
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 847 registered facilities has an unknown number of unregistered ones.
- Open cleanups are the headline. 65 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