UST Check → counties → Iowa → Winnebago
Underground storage tanks & leak sites in Winnebago County, IA
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.
69registered tank facilities
48open tanks
161closed tanks
26leak incidents on record
3cleanups still open
3 leak cleanups in
Winnebago 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 |
|---|---|---|---|---|
| DON''S MOTOR MART | Lake Mills | 5 / 8 | Open UST(s) | IA11503 |
| CASEY''S GENERAL STORE #3219 | Forest City | 5 / 0 | Open UST(s) | IA7339 |
| AGVANTAGE FS INC LAKE MILLS CARDTROL | Lake Mills | 4 / 4 | Open UST(s) | IA4040 |
| MR JINGLES JUICE -N- GO | Zwingle | 4 / 4 | Open UST(s) | IA18035 |
| KWIK STAR 940 | Forest City | 4 / 3 | Open UST(s) | IA7526 |
| DAVE''S 66 SERVICE | Lake Mills | 3 / 5 | Open UST(s) | IA9599 |
| SCHNEBLY''S | Forest City | 3 / 4 | Open UST(s) | IA5512 |
| GOLDYS | Forest City | 3 / 4 | Open UST(s) | IA7527 |
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 69 registered facilities has an unknown number of unregistered ones.
- Open cleanups are the headline. 3 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