UST Check → counties → Washington → Columbia
Underground storage tanks & leak sites in Columbia 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.
43registered tank facilities
14open tanks
108closed tanks
1leak incidents on record
1cleanups still open
1 leak cleanup in
Columbia County is 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 |
|---|---|---|---|---|
| AG LINK INCORPORATED | Dayton | 3 / 8 | Open UST(s) | WA13635797 |
| PDQ | Dayton | 3 / 0 | Open UST(s) | WA19844685 |
| THE GENERAL STORE | Dayton | 3 / 0 | Open UST(s) | WA23953271 |
| PIK-A-POP #20 | Dayton | 2 / 7 | Open UST(s) | WA93264346 |
| SHELL SERVICE AND FOOD MART | Dayton | 2 / 5 | Open UST(s) | WA85257979 |
| SKI BLUEWOOD | Dayton | 1 / 0 | Open UST(s) | WA38536758 |
| GREEN GIANT PILLSBURY CO | Dayton | 0 / 6 | Closed UST(s) | WA20449158 |
| LITTLE GOOSE LOCK AND DAM | Dayton | 0 / 6 | Closed UST(s) | WA81219357 |
Open leak cleanups — most recently reported
| Site | City | Reported | Substance | EPA record |
|---|---|---|---|---|
| DAYTON CITY SHOP | DAYTON | not reported | Petroleum-Other | WA8058 |
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 43 registered facilities has an unknown number of unregistered ones.
- Open cleanups are the headline. 1 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