Region
Arizona
2
Black Mesa (Navajo County and Apache County)
2
California
2
Louisiana
2
Black Mesa (Navajo County and Apache County, Ariz.)
1
Cape Cod
1
East Baton Rouge Parish
1
Flagler County
1
Florida
1
Guam
1
Kansas
1
Massachusetts
1
Nevada County
1
Northern Guam Lens Aquifer (Guam)
1
Ohio
1
Oregon
1
Owl Creek Watershed (Hot Springs County)
1
West Baton Rouge Parish
1
Wyoming
1