Region
- United States 412 results
- Colorado 6 results
- Garfield County 5 results
- Great Britain 5 results
- San Juan Basin (N.M. and Colo.) 5 results
- Connecticut 4 results
- New London 4 results
- California 3 results
- Germany 3 results
- Rocky Mountains 3 results
- Louisiana 2 results
- New London (Conn.) 2 results
- Norway 2 results
- Point Reyes National Seashore (Calif.) 2 results
- San Juan Basin 2 results
- St. Johns River Water Management District (Fla.) 2 results
- Washington (D.C.) 2 results
- Australia 1 results
- Confederated Tribes of Siletz Indians of Oregon 1 results
- Detroit 1 results
- Detroit (Mich.) 1 results
- England 1 results
- Japan 1 results
- Mexican-American Border Region 1 results
- Michigan 1 results
- Milwaukee 1 results
- Red River (Tex.-La.) 1 results
- Rhode Island 1 results
- South Africa 1 results
- South Carolina 1 results
- USA 1 results
- Wisconsin 1 results