UST Check → counties → Texas → Williamson
Underground storage tanks & leak sites in Williamson County, TX
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.
475registered tank facilities
545open tanks
713closed tanks
181leak incidents on record
3cleanups still open
3 leak cleanups in
Williamson 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 |
|---|---|---|---|---|
| CIRCLE K STORE 2706981 | JARRELL | 6 / 0 | Open UST(s) | TX71814 |
| EAGLE MART | ROUND ROCK | 5 / 0 | Open UST(s) | TX56689 |
| STAR STOP 80 | ROUND ROCK | 4 / 7 | Open UST(s) | TX52593 |
| WAG-A-BAG 18 | HUTTO | 4 / 6 | Open UST(s) | TX39249 |
| CORNER STORE 3959 | GEORGETOWN | 4 / 5 | Open UST(s) | TX79639 |
| COURTESY SHELL 5 | AUSTIN | 4 / 4 | Open UST(s) | TX79636 |
| SHELL MINI MART 1 | ROUND ROCK | 4 / 4 | Open UST(s) | TX79632 |
| SAMS CLUB 6188 | AUSTIN | 4 / 0 | Open UST(s) | TX132026 |
Open leak cleanups — most recently reported
| Site | City | Reported | Substance | EPA record |
|---|---|---|---|---|
| CITY OF TAYLOR SKATE PARK | TAYLOR | 2018-02-16 | — | TX120457 |
| TP 2527 | ROUND ROCK | 2017-06-01 | — | TX120309 |
| GEORGETOWN MUNICIPAL AIRPORT | GEORGETOWN | 2017-05-30 | — | TX120366 |
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 475 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