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- Floridan Aquifer2
- GeorgiaHunter Army Airfield2
- Minnesota2
- Oklahoma2
- WyomingJackson2
- Anacostia River Watershed (Md. and Washington, D.C.)1
- Black Canyon (Ariz. and Nev.)1
- CaliforniaModesto1
- CaliforniaModesto Region1
- Canadian River Valley1
- Columbia Plateau1
- East (U.S.)1
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- GeorgiaChatham County1
- GeorgiaWaynesboro1
- Great Plains1
- Green River Watershed (Wyo.-Utah)1
- IdahoWood River Valley1
- IowaLinn County1
- LouisianaBaton Rouge Region1