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County file — CT

Underground Storage Tanks in Middlesex County, CT — 474 facilities, 117 leak records

What the EPA UST Finder snapshot (2018–2021 state data) shows for Middlesex County, population 166,528.

474UST facilities
277tanks in service
1,573closed tanks
117leak records
42open cases
75no further action

Middlesex County has 474 registered underground storage tank facilities in the national snapshot — gas stations, fleet yards, and other regulated fuel sites — holding 277 tanks in service and 1,573 tanks that have been closed or removed, plus 20 temporarily out of service. Over the life of the program, 117 fuel releases were reported here; 75 (64% of records) were investigated and closed with No Further Action, and 42 of those cleanup cases were still open when the snapshot was compiled.

That works out to 16.6 tanks in service per 10,000 residents, above the Connecticut average of 14.2 per 10,000. Countywide numbers are context, not a verdict on any parcel — tank risk is hyper-local, falling off within a few hundred feet.

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Frequently asked questions

How many underground storage tanks are in Middlesex County, CT?

The EPA UST Finder snapshot lists 474 registered UST facilities in Middlesex County with 277 tanks currently in service, 1,573 closed or removed tanks, and 20 temporarily out of service.

How many fuel leaks have been reported in Middlesex County?

117 releases from underground storage tanks are on record for Middlesex County. 75 (64%) reached No Further Action status, while 42 cleanup cases remained open in the snapshot.

How do I check a specific address in Middlesex County?

Use the free TankCheck screening at https://tankcheckusa.site/ — paste any Middlesex County address to map every registered tank and reported leak within a mile, with distances in feet and an A–F screening grade. Verify current records with the CT DEEP UST Program.

Verify with the state

The live regulatory record for any Middlesex County facility or leak case is held by the CT DEEP UST Program. Newer records than this 2018–2021 snapshot may exist.

Nearby countys in Connecticut

← All Connecticut counts