State file — WY
Underground storage tanks in Wyoming
3,759 registered facilities · 1,846 tanks in service · 1,616 leak records · 344 open cleanup cases (EPA UST Finder snapshot, 2018–2021 state data).
Wyoming runs 30.9 tanks in service per 10,000 residents (population 598,332). 1,260 of its 1,616 reported releases have reached No Further Action. The regulator of record is the Wyoming DEQ Storage Tank Program, which holds the live registration and case files.
Check any Wyoming address
Free screening of every registered tank and reported leak within a mile of any address.
Screen an addressBy county
| County | Facilities | Tanks in service | Leak records | Open cases |
|---|---|---|---|---|
| Albany County | 152 | 107 | 83 | 24 |
| Big Horn County | 121 | 52 | 63 | 15 |
| Campbell County | 180 | 103 | 74 | 12 |
| Carbon County | 212 | 95 | 102 | 30 |
| Converse County | 101 | 34 | 30 | 10 |
| Crook County | 56 | 41 | 28 | 6 |
| Fremont County | 305 | 101 | 160 | 31 |
| Goshen County | 111 | 54 | 24 | 1 |
| Hot Springs County | 52 | 10 | 27 | 2 |
| Johnson County | 68 | 34 | 27 | 4 |
| Laramie County | 385 | 231 | 125 | 30 |
| Lincoln County | 138 | 65 | 49 | 13 |
| Natrona County | 493 | 170 | 178 | 32 |
| Niobrara County | 32 | 0 | 8 | 2 |
| Park County | 233 | 121 | 100 | 7 |
| Platte County | 157 | 50 | 24 | 3 |
| Sheridan County | 142 | 88 | 75 | 11 |
| Sublette County | 69 | 33 | 33 | 8 |
| Sweetwater County | 297 | 171 | 165 | 52 |
| Teton County | 189 | 142 | 79 | 14 |
| Uinta County | 141 | 83 | 75 | 21 |
| Washakie County | 70 | 29 | 52 | 10 |
| Weston County | 55 | 32 | 35 | 6 |
Frequently asked questions
How many underground storage tanks are in Wyoming?
The EPA UST Finder snapshot lists 3,759 registered UST facilities in Wyoming, with 1,846 tanks in service and 8,558 closed or removed tanks across 23 countys.
How many tank leaks have been reported in Wyoming?
1,616 releases are on record statewide. 1,260 (78%) were closed with No Further Action; 344 cleanup cases remained open in the snapshot.
Which Wyoming county has the most underground storage tanks?
By facility count: Natrona (493), Laramie (385), Fremont (305), Sweetwater (297), Park (233). Use the county pages for tank and leak detail, or screen any specific address free at https://tankcheckusa.site/.