About 140 million people—almost one-half of the Nation’s population—rely on groundwater for public supply, and demand for groundwater for public supply, irrigation and agriculture continues to increase.
The United States Geological Survey (USGS) maintains an interactive map which shows how concentrations of pesticides, nutrients, metals, and organic contaminants in groundwater are changing during decadal periods across the nation.
Tracking changes in groundwater quality and investigating the reasons for these changes is crucial for informing management decisions to protect and sustain our valuable groundwater resources.
See how Indiana and other regions are doing at the Groundwater Quality Mapping Tool at the USGS.