UST Check → counties → New York → Nassau
Underground storage tanks & leak sites in Nassau County, NY
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.
260registered tank facilities
464open tanks
107closed tanks
1,555leak incidents on record
47cleanups still open
47 leak cleanups in
Nassau 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 |
|---|---|---|---|---|
| BETHPAGE STATE PARK | FARMINGDALE | 9 / 0 | Open UST(s) | NY567675 |
| SUNY COLLEGE AT OLD WESTBURY | OLD WESTBURY | 9 / 0 | Open UST(s) | NY400941 |
| GREAT NECK TERRACE APARTMENTS | GREAT NECK | 8 / 0 | Open UST(s) | NY392076 |
| NUMC A. HOLLY PATTERSON EXTENDED CARE FACILITY | UNIONDALE | 7 / 0 | Open UST(s) | NY482883 |
| TOWN OF OYSTER BAY | SYOSSET | 7 / 0 | Open UST(s) | NY424313 |
| OSWEGO OIL SERVICE CORPORATION | HEMPSTEAD | 6 / 0 | Open UST(s) | NY397861 |
| SUNOCO | BALDWIN | 5 / 0 | Open UST(s) | NY445385 |
| GAS STOP | INWOOD | 5 / 0 | Open UST(s) | NY407738 |
Open leak cleanups — most recently reported
| Site | City | Reported | Substance | EPA record |
|---|---|---|---|---|
| UNITED AUTO REPAIR | BALDWIN | 2006-04-18 | — | NY600706 |
| GETTY 58603 | HEWLETT | 2006-02-28 | — | NY513739 |
| LIBERTY PETRO | ELMONT | 2005-12-09 | — | NY510613 |
| SHELL STATION #138717 | WANTAGH | 2005-05-12 | — | NY501765 |
| P SUPER STATION | ISLAND PARK | 2005-04-08 | — | NY500404 |
| GREEN TREE | MANHASSET | 2004-08-10 | — | NY425210 |
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 260 registered facilities has an unknown number of unregistered ones.
- Open cleanups are the headline. 47 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