Region
Middle West
3
Jones County
2
North Carolina
2
Onslow County
2
Arizona
1
Charleston
1
Cheyenne
1
Colorado
1
Colorado River Watershed (Colo.-Mexico)
1
Door County
1
Hopi Indian Reservation
1
Kansas
1
Mississippi
1
Montana
1
Navajo Indian Reservation
1
Nevada
1
New Mexico
1
Northwestern States
1
Nye County
1
South Carolina
1
Utah
1
Virginia
1
Wisconsin
1