UST Check → counties → South Dakota → Day
Underground storage tanks & leak sites in Day County, SD
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.
46registered tank facilities
20open tanks
123closed tanks
69leak incidents on record
11cleanups still open
11 leak cleanups in
Day 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 |
|---|---|---|---|---|
| CENEX C STORE | WEBSTER | 5 / 8 | Open UST(s) | SD22-00011 |
| HORTER RESTORATION & REPAIR | BRISTOL | 3 / 5 | Open UST(s) | SD22-00041 |
| PIKE'S CLARK | WEBSTER | 3 / 3 | Open UST(s) | SD22-00050 |
| PIERPONT SERVICE & SUPPLY | PIERPONT | 3 / 3 | Open UST(s) | SD22-00044 |
| SD DEPT OF TRANSPORTATION | WEBSTER | 3 / 1 | Open UST(s) | SD22-00055 |
| CASEY'S GENERAL STORE | WEBSTER | 2 / 0 | Open UST(s) | SD22-00002 |
| GRENVILLE SPORTS MART | GRENVILLE | 1 / 2 | Open UST(s) | SD22-00017 |
| COMMUNITY OIL CO | WEBSTER | 0 / 11 | Closed UST(s) | SD22-00016 |
Open leak cleanups — most recently reported
| Site | City | Reported | Substance | EPA record |
|---|---|---|---|---|
| Webster Amoco Food Shop | Webster | 1995-09-20 | Petroleum | SD95.259 |
| Former Implement Dealer - Tank Removal | Webster | 1994-08-17 | Petroleum | SD94.243 |
| Burlington Northern Railroad Assessment (BNSF) | Webster | 1993-06-17 | Petroleum | SD93.176 |
| Hansmeier & Son Inc. Farm | Bristol | 1992-10-19 | Petroleum | SD92.359 |
| Former Community Oil Company Site | Webster | 1991-11-27 | Petroleum | SD91.534 |
| Community Oil Company | Roslyn | 1991-02-13 | Petroleum | SD91.129 |
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 46 registered facilities has an unknown number of unregistered ones.
- Open cleanups are the headline. 11 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