UST Check → counties → Washington → Benton
Underground storage tanks & leak sites in Benton 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.
378registered tank facilities
221open tanks
1,051closed tanks
33leak incidents on record
33cleanups still open
33 leak cleanups in
Benton 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 |
|---|---|---|---|---|
| US DOE 400 Area | Richland | 6 / 216 | Open UST(s) | WA52692642 |
| AMERISTAR # 20 | Prosser | 5 / 2 | Open UST(s) | WA28995469 |
| BYE PASS FOOD MART | Richland | 5 / 0 | Open UST(s) | WA95952813 |
| LOVES TRAVELS STOP #681 | Prosser | 5 / 0 | Open UST(s) | WA15968 |
| PRIOR FARMS | Plymouth | 4 / 8 | Open UST(s) | WA5654577 |
| ONE STOP MART #11 | Richland | 4 / 5 | Open UST(s) | WA13229546 |
| PACIFIC FOOD MART | Kennewick | 4 / 3 | Open UST(s) | WA74193513 |
| DESERT FOOD MART | Benton City | 4 / 0 | Open UST(s) | WA84919579 |
Open leak cleanups — most recently reported
| Site | City | Reported | Substance | EPA record |
|---|---|---|---|---|
| UNOCAL CHEMICALS & MINERALS DIVISION | KENNEWICK | not reported | Conventional Contaminants, Organic | WA7342 |
| CHEVRON STATION 98944 | RICHLAND | not reported | Benzene | WA5798 |
| Horse Heaven Hills Travel Plaza | PROSSER | not reported | Benzene | WA12353 |
| B & B Equipment Co Inc | PROSSER | not reported | Metals Priority Pollutants | WA4890 |
| Richland Horn Rapids Landfill | RICHLAND | not reported | Conventional Contaminants, Inorganic | WA4891 |
| Ben Franklin Transit Co | RICHLAND | not reported | Conventional Contaminants, Organic | WA7012 |
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 378 registered facilities has an unknown number of unregistered ones.
- Open cleanups are the headline. 33 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