UST Check → counties → New Jersey → Mercer
Underground storage tanks & leak sites in Mercer County, NJ
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.
983registered tank facilities
537open tanks
3,385closed tanks
733leak incidents on record
204cleanups still open
204 leak cleanups in
Mercer 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 |
|---|---|---|---|---|
| CIFELLI'S QUALITY FUELS LLC | Ewing Twp | 8 / 0 | Open UST(s) | NJ033051 |
| WOODROW WILSON SERVICE AREA 6N | Hamilton Twp | 6 / 8 | Open UST(s) | NJ013300 |
| RICHARD STOCKTON SERVICE AREA 6-S | Hamilton Twp | 6 / 6 | Open UST(s) | NJ013301 |
| APCO PETROLEUM CORP WASHINGTON TWP VALERO | Robbinsville Twp | 6 / 5 | Open UST(s) | NJ013336 |
| WINDSOR FUEL KING GULF | Robbinsville Twp | 6 / 3 | Open UST(s) | NJ007122 |
| EDUCATIONAL TESTING SERVICE | Lawrence Twp | 5 / 15 | Open UST(s) | NJ002562 |
| DELTA | Hamilton Twp | 5 / 11 | Open UST(s) | NJ010714 |
| 56062 CRANBURY FUELS | East Windsor Twp | 5 / 8 | Open UST(s) | NJ010385 |
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 983 registered facilities has an unknown number of unregistered ones.
- Open cleanups are the headline. 204 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