USGS NAWQA: Factors Affecting Water Quality in Selected Carbonate Aquifers in the US, 1993-2005
This is a summary of the U.S. Geological Survey (USGS) National Water-Quality Assessment (NAWQA) Program study of water quality in carbonate aquifers of the United States. More than 1,000 wells and springs were analyzed for properties and contaminants including pH, major ions, nutrients, trace elements, radon, pesticides, and volatile organic compounds, in 12 carbonate aquifers in the United States.
