UST Check → counties → North Dakota → Cass
Underground storage tanks & leak sites in Cass 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.
399registered tank facilities
393open tanks
914closed tanks
173leak incidents on record
4cleanups still open
4 leak cleanups in
Cass 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 |
|---|---|---|---|---|
| Petro Travel Center | Fargo ND 58103- | 13 / 0 | Open UST(s) | ND6792 |
| Fleet Farm Main Store | Fargo ND 58106- | 9 / 0 | Open UST(s) | ND228 |
| Stamart 5 | Fargo ND 58102 | 9 / 0 | Open UST(s) | ND10538 |
| Petro Serve USA 063 | West Fargo ND 58078- | 8 / 5 | Open UST(s) | ND3004 |
| Kotaco Fuels Inc | Fargo ND 58102- | 6 / 8 | Open UST(s) | ND1388 |
| Petro Serve USA 084 | Fargo ND 58103- | 6 / 8 | Open UST(s) | ND1362 |
| Flying J Travel Plaza 685 | Fargo ND 58103- | 6 / 7 | Open UST(s) | ND1325 |
| City of Fargo | Fargo ND 58102- | 6 / 5 | Open UST(s) | ND804 |
Open leak cleanups — most recently reported
| Site | City | Reported | Substance | EPA record |
|---|---|---|---|---|
| Dons Service Center South | Fargo ND 58103 | not reported | — | ND618 |
| Petro Serve USA 084 | Fargo ND 58103- | not reported | — | ND400 |
| Petro Serve USA 062 | West Fargo ND 58078- | not reported | — | ND274 |
| Caseys General Store 3365 | Fargo ND 58104- | not reported | — | ND888 |
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 399 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