Spencer, J.E., 2002, Natural occurrence of arsenic in Southwest ground water: Southwest Hydrology, v. 1, no. 1, p. 14-15. Authors Spencer, J.E. Publication Date 2002 Citation Southwest Hydrology, v. 1, no. 1, p. 14-15. State AZ NM Province AL County AL Placenames Verde Valley Tucson Basin Safford Basin Basins Lower San Pedro Lower San Pedro-Cgw Lower San Pedro-Mam Upper San Pedro Upper San Pedro-Alf Upper San Pedro-Sev Safford Safford-Saf Tucson Ama Tucson Ama-Usc Verde River Verde River-Ver Watersheds San Pedro River Upper Gila River Santa Cruz River Verde River Keywords Groundwater Geochemical Survey Geothermal More Keywords Groundwater, Geochemical Survey, Geothermal, AzGeoBib RefNum 22012