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USGS CA GAMA-PBP Groundwater-Quality Results: Assessment and Trends
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Public-supply Assessment (PSA)
Public-supply Trends (PST)
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Constituents of Special Interest
Field Water Quality Indicators
Geochemical and Age-Dating Tracers
Major and Minor Ions
Microbiological Constituents
Nutrients
Pesticides and Pesticide Degradates
Pharmaceuticals
Radioactivity
Trace Elements
Volatile Organic Compounds
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Domestic-supply Assessment Grid Cells
Public-supply Assessment Grid Cells
Domestic-supply Assessment Study Units
Public-supply Assessment Study Units
Hydrogeologic Provinces
GAMA Boundaries
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