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County file — WI

Underground Storage Tanks in Waukesha County, WI — 1,448 facilities, 1,197 leak records

What the EPA UST Finder snapshot (2018–2021 state data) shows for Waukesha County, population 402,229.

1,448UST facilities
616tanks in service
3,582closed tanks
1,197leak records
42open cases
1,155no further action

Waukesha County has 1,448 registered underground storage tank facilities in the national snapshot — gas stations, fleet yards, and other regulated fuel sites — holding 616 tanks in service and 3,582 tanks that have been closed or removed, plus 4 temporarily out of service. Over the life of the program, 1,197 fuel releases were reported here; 1,155 (96% 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 15.3 tanks in service per 10,000 residents, well below the Wisconsin average of 20.7 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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Paste an address to map every registered tank and reported leak within a mile — distances in feet, cleanup statuses, and an A–F screening grade. Free, no login.

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Frequently asked questions

How many underground storage tanks are in Waukesha County, WI?

The EPA UST Finder snapshot lists 1,448 registered UST facilities in Waukesha County with 616 tanks currently in service, 3,582 closed or removed tanks, and 4 temporarily out of service.

How many fuel leaks have been reported in Waukesha County?

1,197 releases from underground storage tanks are on record for Waukesha County. 1,155 (96%) reached No Further Action status, while 42 cleanup cases remained open in the snapshot.

How do I check a specific address in Waukesha County?

Use the free TankCheck screening at https://tankcheckusa.site/ — paste any Waukesha 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 Wisconsin DATCP Storage Tanks.

Verify with the state

The live regulatory record for any Waukesha County facility or leak case is held by the Wisconsin DATCP Storage Tanks. Newer records than this 2018–2021 snapshot may exist.

Nearby countys in Wisconsin

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