Maps & Data

27 Resources Curated resources for the H2O Network.

Maps & Data continuous

Penn State Institutes of Energy and the Environment / PA Office of Administration

Pennsylvania Spatial Data Access (PASDA)

Pennsylvania's official public clearinghouse for free GIS data — watershed boundaries, hydrology, land cover, parcels, conservation lands, environmental…

Maps & Data continuous

U.S. Geological Survey (USGS)

USGS National Water Information System (NWIS) & Water Data for the Nation

Free public access to 135+ years of U.S. surface water, groundwater, and water quality data from over 1.5…

Maps & Data continuous

U.S. Environmental Protection Agency

EPA WATERS Tools and How’s My Waterway

EPA's integrated water quality data platform: map-based access to 303(d) impaired waters, TMDL status, watershed boundaries, and How's…