UST Check → counties → Iowa → Mahaska
Underground storage tanks & leak sites in Mahaska 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.
103registered tank facilities
43open tanks
213closed tanks
48leak incidents on record
3cleanups still open
3 leak cleanups in
Mahaska 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 |
|---|---|---|---|---|
| WATERING HOLE | Oskaloosa | 3 / 5 | Open UST(s) | IA6644 |
| CASEY''S GENERAL STORE 3215 | Oskaloosa | 3 / 5 | Open UST(s) | IA6639 |
| PRONTO OF NEW SHARON | New Sharon | 3 / 0 | Open UST(s) | IA4812 |
| AGRILAND FS | Oskaloosa | 3 / 0 | Open UST(s) | IA17153 |
| CASEY''S GENERAL STORE 1682 | Oskaloosa | 3 / 0 | Open UST(s) | IA17155 |
| JIFFY CONVENIENCE STORE | Oskaloosa | 2 / 3 | Open UST(s) | IA8896 |
| MIKES MARKET & DELI | Oskaloosa | 2 / 2 | Open UST(s) | IA5070 |
| OSKALOOSA SERVICE CENTER | Oskaloosa | 2 / 2 | Open UST(s) | IA1482 |
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 103 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