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Region
- Louisiana2
- New JerseyOcean County2
- New JerseyRancocas Creek Watershed2
- Northern Mariana IslandsSaipan2
- AlaskaGlacier Bay1
- ArizonaTucson Aqueduct1
- CaliforniaLos Angeles Region1
- Glacier Bay (Alaska)1
- KentuckyJefferson County1
- Los Angeles Region (Calif.)1
- Naval Ordnance Station Louisville (Ky.)1
- Sparta Aquifer (Ark. and La.)1