UST Check → counties → Washington → Walla Walla
Underground storage tanks & leak sites in Walla Walla County, WA
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.
276registered tank facilities
102open tanks
629closed tanks
16leak incidents on record
16cleanups still open
16 leak cleanups in
Walla Walla 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 |
|---|---|---|---|---|
| BYRNES OIL COMPANY INC | Walla Walla | 8 / 4 | Open UST(s) | WA43322744 |
| CHS | Walla Walla | 6 / 0 | Open UST(s) | WA29276273 |
| TOM'S SOUTHGATE CHEVRON | Walla Walla | 5 / 0 | Open UST(s) | WA62097595 |
| TOUCHET CHEVRON | Touchet | 4 / 3 | Open UST(s) | WA42862563 |
| CHS INC. | Walla Walla | 4 / 2 | Open UST(s) | WA89641838 |
| QUALITY PETROLEUM PRODUCTS INC | Walla Walla | 4 / 0 | Open UST(s) | WA91396832 |
| VISTA SHELL GAS STATION & GROCERY | Walla Walla | 4 / 0 | Open UST(s) | WA99134781 |
| TAJ FOOD MART | Walla Walla | 3 / 4 | Open UST(s) | WA3491851 |
Open leak cleanups — most recently reported
| Site | City | Reported | Substance | EPA record |
|---|---|---|---|---|
| OLD MILTON SERVICE STATION | WALLA WALLA | not reported | Petroleum Products-Unspecified | WA5268 |
| Grand View Farms | BURBANK | not reported | Petroleum-Diesel | WA8285 |
| JACKPOT FOOD MART 047 | WALLA WALLA | not reported | Benzene | WA5524 |
| Unocal SS 0191 | WALLA WALLA | not reported | Benzene | WA5527 |
| WAITSBURG CITY SHOP | WAITSBURG | not reported | Petroleum-Other | WA11005 |
| Seneca Foods | WALLA WALLA | not reported | Petroleum-Other | WA9465 |
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 276 registered facilities has an unknown number of unregistered ones.
- Open cleanups are the headline. 16 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