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Underground storage tanks & leak sites in Oklahoma County, OK

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.

2,241registered tank facilities

1,387open tanks

5,049closed tanks

983leak incidents on record

49cleanups still open

49 leak cleanups in Oklahoma 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
Kickapoo Conoco	Harrah	2 / 0	Open UST(s)	0185OK

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 2,241 registered facilities has an unknown number of unregistered ones.
Open cleanups are the headline. 49 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 works

This 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