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Ilydrogeology and Water Quality by State
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alluvial alluvium Analysis of Selected Appalachian Plateau areas based include basins bedrock Ca+Mg Na+K N05 Census Chemical Analysis chloride Cl SQ Ca+Mg Cl SQ Dissolved Coastal Plain Colorado Plateau Concentrations in mg/1 Cretaceous D.S. Hardness Cl Data Dissolved Hardness Solids Dissolved Solids contoured dolomite domestic and municipal eastem ﬂows Geological ground water ground water quality ground-water quality maps Ground-Water Supplies Concentrations hard water Hardness Cl SQ Hardness Solids Mean high concentrations highly mineralized inches irrigation less limestone maps are based Maximum Mesozoic metamorphic rocks Minimum Mountains Municipal Ground-Water Supplies N05 Fe F Na+K N05 Fe northem Ordovician Paleozoic permeable Piedmont Precambrian Quatemary ranges region runolf sand and gravel sandstone sedimentary rocks sediments Selected Counties Concentrations Selected Municipal Ground-Water shale sodium Solids contoured mg/l South Dakota southem southwestem SQ Ca+Mg Na+K SQ Dissolved Hardness strata sulfate Town Population underlain Variability Within Selected water quality maps Water Quality Variability westem yields