UST Check → counties → Washington → Grant
Underground storage tanks & leak sites in Grant 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.
472registered tank facilities
188open tanks
1,082closed tanks
18leak incidents on record
18cleanups still open
18 leak cleanups in
Grant 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 |
|---|---|---|---|---|
| MICROSOFT CORPORATION | Quincy | 8 / 0 | Open UST(s) | WA5569630 |
| INTERGATE QUINCY LLC | Quincy | 8 / 0 | Open UST(s) | WA18017 |
| YAHOO | Quincy | 7 / 0 | Open UST(s) | WA5061709 |
| ERNIE'S FUEL STOP | Moses Lake | 4 / 9 | Open UST(s) | WA620 |
| CIRCLE K 6045 | Moses Lake | 4 / 6 | Open UST(s) | WA604 |
| COLEMAN OIL COMPANY | Royal City | 4 / 4 | Open UST(s) | WA71463191 |
| CHS SUN BASIN | Moses Lake | 4 / 4 | Open UST(s) | WA64543664 |
| TIGER PAWS | Ephrata | 4 / 3 | Open UST(s) | WA65648428 |
Open leak cleanups — most recently reported
| Site | City | Reported | Substance | EPA record |
|---|---|---|---|---|
| GRANT COUNTY AIRPORT | MOSES LAKE | not reported | Petroleum-Diesel | WA7165 |
| US BUREAU OF RECLAMATION | GRAND COULEE | not reported | Petroleum-Other | WA1051 |
| 1716 W BROADWAY MOSES LAKE | MOSES LAKE | not reported | Petroleum-Other | WA8324 |
| COLUMBIA BASIN NURSERY | QUINCY | not reported | Petroleum-Other | WA8571 |
| COLUMBIA BASIN HATCHERY | MOSES LAKE | not reported | Benzene | WA8840 |
| BPA MAINTENANCE FACILITY | GRAND COULEE | not reported | Petroleum-Other | WA11017 |
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 472 registered facilities has an unknown number of unregistered ones.
- Open cleanups are the headline. 18 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