Number of uninspected wells per county.

County Number of wells
Wyoming: 632
Johnson County 249
Campbell County 161
Natrona County 149
Sublette County 36
Fremont County 17
Sheridan County 8
Converse County 5
Niobrara County 2
Park County 2
Uinta County 2
Sweetwater County 1
Colorado: 244
Garfield County 200
Rio Blanco County 25
Weld County 5
Phillips County 4
Moffat County 3
Archuleta County 2
Mesa County 2
Las Animas County 1
Montezuma County 1
Yuma County 1
Utah: 220
Uintah County 110
Duchesne County 74
Carbon County 32
Grand County 2
San Juan County 2
New Mexico: 121
Rio Arriba County 57
San Juan County 50
Eddy County 8
Lea County 4
Sandoval County 2
North Dakota: 116
McKenzie County 47
Dunn County 42
Mountrail County 13
Williams County 6
McLean County 5
Billiings County 2
Golden Valley County 1
California: 31
Kern County 31
Montana: 25
Fallon County 6
Glacier County 6
Big Horn County 4
Blaine County 2
Richland County 2
Roosevelt County 2
Carbon County 1
Phillips County 1
Toole County 1
Arkansas: 5
Sebastian County 3
Logan County 2
Louisiana: 3
Bienville County 3
Alaska: 1
Kenai Peninsula 1
Oklahoma: 1
Roger Mills County 1
Pennsylvania: 1
Forest County 1
South Dakota: 1
Harding County 1

Source: Bureau of Land Management

Chart by AJ Vicens