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State file — IL

Underground storage tanks in Illinois

28,236 registered facilities · 17,907 tanks in service · 25,334 leak records · 5,924 open cleanup cases (EPA UST Finder snapshot, 2018–2021 state data).

28,236UST facilities
17,907tanks in service
66,419closed tanks
25,334leak records
5,924open cases
77%cases closed / NFA

Illinois runs 13.7 tanks in service per 10,000 residents (population 13,027,812). 19,410 of its 25,334 reported releases have reached No Further Action. The regulator of record is the Illinois EPA LUST Program / OSFM, which holds the live registration and case files.

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By county

CountyFacilitiesTanks in serviceLeak recordsOpen cases
Adams County23314111726
Alexander County45113812
Bond County76395612
Boone County101888323
Brown County3121133
Bureau County20410911537
Calhoun County242106
Carroll County94466223
Cass County87334217
Champaign County47929936884
Christian County1368210328
Clark County73494712
Clay County6633488
Clinton County140779829
Coles County1727813329
Cook County7,5475,1339,8092,017
Crawford County110275714
Cumberland County3322219
De Witt County74365416
DeKalb County27316420455
Douglas County90487019
DuPage County1,5691,2251,851297
Edgar County7534447
Edwards County5214278
Effingham County17013115339
Fayette County104448212
Ford County85434913
Franklin County1606912036
Fulton County1506510243
Gallatin County5492612
Greene County6836449
Grundy County1431229628
Hamilton County3815244
Hancock County87445021
Hardin County298205
Henderson County3822145
Henry County24615315744
Iroquois County194879830
Jackson County1859114043
Jasper County5112372
Jefferson County1949915037
Jersey County6227426
Jo Daviess County131609130
Johnson County50223318
Kane County900645805174
Kankakee County32021016836
Kendall County1191167216
Knox County22710714247
LaSalle County45528532583
Lake County1,1909541,450362
Lawrence County64173218
Lee County1798110130
Livingston County2159911033
Logan County145558922
Macon County35420930762
Macoupin County1829513339
Madison County732390606179
Marion County1487014246
Marshall County85373312
Mason County9536306
Massac County50144914
McDonough County122509531
McHenry County53634933868
McLean County44331031586
Menard County45162918
Mercer County92423619
Monroe County80505113
Montgomery County1628511135
Morgan County178969217
Moultrie County57273212
Ogle County25612514337
Peoria County53334132092
Perry County69256317
Piatt County85374216
Pike County117606521
Pope County188133
Pulaski County45222111
Putnam County4127166
Randolph County143558827
Richland County69224411
Rock Island County41733631070
Saline County101686619
Sangamon County526373455105
Schuyler County3121162
Scott County3514165
Shelby County99496721
St. Clair County686381561196
Stark County31111814
Stephenson County1459210630
Tazewell County42430622747
Union County78334111
Vermilion County34815320664
Wabash County90323814
Warren County101406322
Washington County70384812
Wayne County91356025
White County89415220
Whiteside County26310711734
Will County787864609123
Williamson County21113514941
Winnebago County88456649989
Woodford County1557510413

Frequently asked questions

How many underground storage tanks are in Illinois?

The EPA UST Finder snapshot lists 28,236 registered UST facilities in Illinois, with 17,907 tanks in service and 66,419 closed or removed tanks across 102 countys.

How many tank leaks have been reported in Illinois?

25,334 releases are on record statewide. 19,410 (77%) were closed with No Further Action; 5,924 cleanup cases remained open in the snapshot.

Which Illinois county has the most underground storage tanks?

By facility count: Cook (7,547), DuPage (1,569), Lake (1,190), Kane (900), Winnebago (884). Use the county pages for tank and leak detail, or screen any specific address free at https://tankcheckusa.site/.