Moving from Monitoring to Prediction: National Assessment of Nitrate in Ground Water
Proper assessment of nitrate contamination can't solely rely on monitoring efforts.
By integrating data from both monitoring and models, the U.S. Geological Survey (USGS) has assessed ground water quality over broad areas - covering states, regions and the nation. For example, the USGS National Water Quality Assessment (NAWQA) program has assessed the risk of nitrate contamination in shallow ground water across the conterminous United States on the basis of: