UST Check → counties → North Dakota → Williams
Underground storage tanks & leak sites in Williams County, ND
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.
147registered tank facilities
107open tanks
356closed tanks
51leak incidents on record
4cleanups still open
4 leak cleanups in
Williams 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 |
|---|---|---|---|---|
| Holiday Stationstore #446 | Williston ND 58801- | 8 / 0 | Open UST(s) | ND10998 |
| Basin Oil Company | Tioga ND 58852 | 7 / 0 | Open UST(s) | ND10514 |
| Loves Travel Stop 474 | Williston ND 58801- | 7 / 0 | Open UST(s) | ND10805 |
| Holiday Stationstore #433 | Williston ND 58801- | 6 / 0 | Open UST(s) | ND10906 |
| Farmers Union Oil Co C Store | Tioga ND 58852- | 6 / 0 | Open UST(s) | ND10777 |
| Pilot Travel Center 589 | Williston ND 58801- | 6 / 0 | Open UST(s) | ND10808 |
| Farmers Union Oil Company | Williston ND 58801- | 5 / 10 | Open UST(s) | ND3485 |
| Simonson Station Stores Inc | Williston ND 58801- | 5 / 5 | Open UST(s) | ND1764 |
Open leak cleanups — most recently reported
| Site | City | Reported | Substance | EPA record |
|---|---|---|---|---|
| Williston ND C Store | Williston ND 58801- | not reported | — | ND92 |
| Safari Fuels 101 | Williston ND 58802- | not reported | — | ND491 |
| Williams County Highway Department | Williston ND 58802-1305 | not reported | — | ND157 |
| Kum and Go Store 812 | Tioga ND 58852- | not reported | — | ND353 |
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 147 registered facilities has an unknown number of unregistered ones.
- Open cleanups are the headline. 4 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