UST Check → counties → Washington → Asotin
Underground storage tanks & leak sites in Asotin 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.
66registered tank facilities
19open tanks
146closed tanks
3leak incidents on record
3cleanups still open
3 leak cleanups in
Asotin 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 |
|---|---|---|---|---|
| ASOTIN COUNTY SHOP | Clarkston | 3 / 0 | Open UST(s) | WA66155946 |
| COSTCO WHOLESALE #103 | Clarkston | 3 / 0 | Open UST(s) | WA89886761 |
| COLEMAN OIL CFN CARDOCK FUEL | Clarkston | 3 / 0 | Open UST(s) | WA93963234 |
| RICK'S FAMILY FOODS | Clarkston | 2 / 3 | Open UST(s) | WA62719856 |
| CENEX ZIP TRIP #38 | Asotin | 2 / 3 | Open UST(s) | WA62853959 |
| SAMMY'S FAMILY FOODS LLC DBA HEIGHTS FAMILY FOODS | Clarkston | 2 / 2 | Open UST(s) | WA98671691 |
| CENEX ZIP TRIP #22 | Clarkston | 2 / 0 | Open UST(s) | WA7712738 |
| TRI-STATE MEMORIAL HOSPITAL | Clarkston | 1 / 3 | Open UST(s) | WA63376447 |
Open leak cleanups — most recently reported
| Site | City | Reported | Substance | EPA record |
|---|---|---|---|---|
| DOT MAINTENANCE SITE | ANATONE | not reported | Petroleum-Other | WA9617 |
| CLARKSTON CITY OF STREET SHOP | CLARKSTON | not reported | Benzene | WA9040 |
| CLARKSTON HIGH SCHOOL BUS GARAGE | CLARKSTON | not reported | Petroleum-Other | WA10120 |
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 66 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