State file — SD
Underground storage tanks in South Dakota
3,357 registered facilities · 2,889 tanks in service · 4,082 leak records · 196 open cleanup cases (EPA UST Finder snapshot, 2018–2021 state data).
South Dakota runs 32.8 tanks in service per 10,000 residents (population 880,051). 3,778 of its 4,082 reported releases have reached No Further Action. The regulator of record is the SD DANR Tanks & Spills, which holds the live registration and case files.
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Frequently asked questions
How many underground storage tanks are in South Dakota?
The EPA UST Finder snapshot lists 3,357 registered UST facilities in South Dakota, with 2,889 tanks in service and 7,602 closed or removed tanks across 66 countys.
How many tank leaks have been reported in South Dakota?
4,082 releases are on record statewide. 3,778 (93%) were closed with No Further Action; 196 cleanup cases remained open in the snapshot.
Which South Dakota county has the most underground storage tanks?
By facility count: Minnehaha (396), Pennington (319), Brown (133), Meade (126), Codington (100). Use the county pages for tank and leak detail, or screen any specific address free at https://tankcheckusa.site/.