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- United States7
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- Washington (State)4
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- Idaho2
- LouisianaLafayette Parish2
- Mississippi Embayment2
- TennesseeMemphis Region2
- Texas2
- UtahSalt Lake County2
- Virginia2
- ArizonaTucson1
- Arkansas1
- ArkansasOzark Aquifer1
- Biscayne Aquifer (Fla.)1
- California1
- Colorado1
- ColoradoFrench Gulch1
- ColoradoFrench Gulch (Summit County)1