The Pennsylvania Rural Water Authority provides free technical assistance to small community water and wastewater systems. The PRWA Source Water Protection Program assists communities with wellhead protection and surface water protection, and provides templates to facilitate source water protection plan development.
The NHD displays the drainage network, specifically rivers, streams, canals, lakes, ponds, coastline, dams, and streamgages in the United States.
The EPA's DWMAPS is an online mapping tool designed to help concerned citizens and resource managers find information about drinking water in their communities and take action to protect their source water.
Overview The Global Surface Water Explorer maps the location and temporal distribution of water surfaces at the global scale for 1984-2015 and provides statistics on the extent and change of those water surfaces. Users can view the data on an interactive map or download datasets.