Water Maps

National databases on surface water and ground water resources are available online and may be helpful in evaluating your water system's source water viability. To find out more about water availability in your area, explore the links below. 

• U.S. Geological Survey's Water Data Discovery features water maps including droughts, floods, streamflow and ground water response to climate change.
• EPA's MyEnvironment website provides environmental information for your area.
• U.S. Geological Survey's National Hydrography Dataset is a comprehensive set of digital spatial data representing the surface water of the United States. These data are designed to be used in general mapping and in the analysis of surfacewater systems using geographic information systems.
• U.S. Geological Survey's Ground Water Atlas of the United States
• EPA's Climate Assessment Tool element of the BASINS water modeling program can be used to support assessment of climate-related water resource impacts and program decisions.