Spatial Coverage
- États-Unis10
- Montana10
- Floridan Aquifer9
- Oswego County.9
- Patapsco Aquifer9
- San Juan Basin (N.M. and Colo.)9
- Southern States9
- Idaho8
- Louisiana8
- Magothy Aquifer8
- Ozark Mountains Region8
- Sumter County (Fla.)8
- Houston Region7
- Miami-Dade County (Fla.)7
- Minnesota7
- Oklahoma7
- South Dakota7
- Washington (State)7
- Alaska6
- High Plains Aquifer6
