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Region
- ArizonaSalt River Valley (Gila County and Maricopa County)2
- New York (State)Cattaraugus County2
- Northern Mariana IslandsSaipan2
- American SamoaTutuila Island1
- ArizonaMaricopa County1
- IndianaLaPorte County1
- IndianaSaint Joseph County1
- Louisiana1
- MichiganBerrien County1
- MichiganCass County1
- Minnesota1
- MinnesotaMinneapolis Region1
- New HampshirePemigewasset River Watershed1
- New York (State)Croton-on-Hudson Region1
- New York (State)Genesee County1
- New York (State)Ossining Region1
- New York (State)Westchester County1
- Sparta Aquifer (Ark. and La.)1
- Tutuila Island (American Samoa)1
- UtahDugway Proving Ground Region1