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County file — NH

Underground Storage Tanks in Merrimack County, NH — 558 facilities, 279 leak records

What the EPA UST Finder snapshot (2018–2021 state data) shows for Merrimack County, population 151,549.

558UST facilities
339tanks in service
1,600closed tanks
279leak records
73open cases
206no further action

Merrimack County has 558 registered underground storage tank facilities in the national snapshot — gas stations, fleet yards, and other regulated fuel sites — holding 339 tanks in service and 1,600 tanks that have been closed or removed. Over the life of the program, 279 fuel releases were reported here; 206 (74% of records) were investigated and closed with No Further Action, and 73 of those cleanup cases were still open when the snapshot was compiled.

That works out to 22.4 tanks in service per 10,000 residents, above the New Hampshire average of 19.8 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 Merrimack County, NH?

The EPA UST Finder snapshot lists 558 registered UST facilities in Merrimack County with 339 tanks currently in service, 1,600 closed or removed tanks, and 0 temporarily out of service.

How many fuel leaks have been reported in Merrimack County?

279 releases from underground storage tanks are on record for Merrimack County. 206 (74%) reached No Further Action status, while 73 cleanup cases remained open in the snapshot.

How do I check a specific address in Merrimack County?

Use the free TankCheck screening at https://tankcheckusa.site/ — paste any Merrimack 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 NHDES UST Program.

Verify with the state

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

Nearby countys in New Hampshire

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