UST Check → counties → Minnesota → Mille Lacs
Underground storage tanks & leak sites in Mille Lacs County, MN
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.
136registered tank facilities
124open tanks
297closed tanks
92leak incidents on record
5cleanups still open
5 leak cleanups in
Mille Lacs 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 |
|---|---|---|---|---|
| Trailside Convenience Bait & Tackle | Isle | 6 / 4 | Open UST(s) | MLB5009 |
| Federated Co-Op | Isle | 5 / 0 | Open UST(s) | MLB5028 |
| Meleen's Sports Center | Onamia | 4 / 0 | Open UST(s) | MLB5019 |
| Anderson Brothers | Onamia | 3 / 5 | Open UST(s) | MLB5003 |
| Onamia School Bus Garage | Onamia | 2 / 1 | Open UST(s) | MLB5015 |
| Isle Public School Bus Garage | Isle | 2 / 1 | Open UST(s) | MLB5030 |
| Lake Stop (FKA: Morning Star Market & Cassidy's Corner Store) | Wahkon | 2 / 0 | Open UST(s) | MLB5033 |
| Fredericksons Marina | Wahkon | 1 / 1 | Open UST(s) | MLB5004 |
Open leak cleanups — most recently reported
| Site | City | Reported | Substance | EPA record |
|---|---|---|---|---|
| Lakeside Auto Body (Mille Lacs Auto Body) | Isle | 2023-01-05 | Unknown Petroleum | R5-0430 |
| MLB C-Store -Tesoro ( FKA: MLB Marathon; MLB Conoco; Petro Plus) | Onamia | 2022-08-03 | Diesel; Gasoline (containing <=10% ethanol) | R5-0429 |
| Mille Lacs Marine ( Former "M & L General Store", "M & L Sports Center", "Trout's Junction") | Onamia | 2018-11-29 | — | R5-0402 |
| Former Hills Market Plus | Onamia | 2018-03-14 | — | MNLS0020652 |
| Federated Co-ops Inc | Chisago City | 2017-11-08 | — | MNLS0020569 |
| Hofman Oil Co Inc | Princeton | 2015-09-29 | — | MNLS0019908 |
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 136 registered facilities has an unknown number of unregistered ones.
- Open cleanups are the headline. 5 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