County file — LA
Underground Storage Tanks in St. Mary Parish, LA — 230 facilities, 78 leak records
What the EPA UST Finder snapshot (2018–2021 state data) shows for St. Mary Parish, population 54,463.
St. Mary Parish has 230 registered underground storage tank facilities in the national snapshot — gas stations, fleet yards, and other regulated fuel sites — holding 118 tanks in service and 516 tanks that have been closed or removed, plus 5 temporarily out of service. Over the life of the program, 78 fuel releases were reported here; 67 (86% of records) were investigated and closed with No Further Action, and 11 of those cleanup cases were still open when the snapshot was compiled.
That works out to 21.7 tanks in service per 10,000 residents, above the Louisiana average of 19.5 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.
Check any address in St. Mary Parish
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.
Screen an addressFrequently asked questions
How many underground storage tanks are in St. Mary Parish, LA?
The EPA UST Finder snapshot lists 230 registered UST facilities in St. Mary Parish with 118 tanks currently in service, 516 closed or removed tanks, and 5 temporarily out of service.
How many fuel leaks have been reported in St. Mary Parish?
78 releases from underground storage tanks are on record for St. Mary Parish. 67 (86%) reached No Further Action status, while 11 cleanup cases remained open in the snapshot.
How do I check a specific address in St. Mary Parish?
Use the free TankCheck screening at https://tankcheckusa.site/ — paste any St. Mary Parish 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 Louisiana DEQ UST Program.
Verify with the state
The live regulatory record for any St. Mary Parish facility or leak case is held by the Louisiana DEQ UST Program. Newer records than this 2018–2021 snapshot may exist.
Nearby parishs in Louisiana
- St. Helena Parish 55 fac · 11 leaks
- St. James Parish 108 fac · 19 leaks
- St. John the Baptist Parish 122 fac · 45 leaks
- St. Landry Parish 425 fac · 156 leaks
- St. Martin Parish 214 fac · 85 leaks
- St. Tammany Parish 418 fac · 212 leaks
- Tangipahoa Parish 396 fac · 121 leaks
- Tensas Parish 27 fac · 5 leaks
- Terrebonne Parish 406 fac · 140 leaks
- Union Parish 130 fac · 25 leaks