About one-half of the U.S. population relies on groundwater for drinking water. The United States of America Geological Survey is responsible for the National Water Quality Assessment Project, assessing water-quality weather condition too whether these weather condition are improving or deteriorating over time.
The results of these changing weather condition are available inward a novel USGS interactive map, A Decadal Look at Groundwater Quality. The map shows the concentrations of pesticides, nutrients, metals, too organic contaminants inward groundwater too how these convey changed over 10 years.
Using the map you lot tin forcefulness out choose to persuasion the examine results for a large release of organic too inorganic constituents. Scaled arrow markers on the map betoken whether the tested aquifers showed an growth or decrease inward the selected gene betwixt the decadal testing. For example, if you lot choose to persuasion the results for chlorine, the arrow markers on the map present that close wells tested convey shown an growth inward chlorine over the 10 years betwixt the 2 latest tests.
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