Maps & Data
rolling
U.S. Environmental Protection Agency
EPA EnviroAtlas
Interactive mapping platform providing ecosystem services and environmental data at national, community, and watershed scales.
Maps & Data
Maps & Data
rolling
Maps & Data
rolling
U.S. Geological Survey
USGS StreamStats
Interactive map-based web application that computes streamflow statistics for any location on a stream, supporting flood risk analysis…
Maps & Data
rolling
U.S. Geological Survey
USGS National Hydrography Dataset (NHD)
Authoritative GIS database of U.S. surface water features — streams, rivers, lakes, ponds, wetlands — used as the…
Maps & Data
rolling
Esri
Esri ArcGIS for Nonprofits
Discounted ArcGIS software licenses, training, and support for qualifying nonprofit and conservation organizations.
Maps & Data
rolling
Chesapeake Bay Program
Chesapeake Bay Program — Data and Visualization Tools
Federal-state partnership data hub providing watershed health indicators, restoration tracking, and water quality data for the Chesapeake Bay…
Maps & Data
rolling
PA Department of Environmental Protection
PA DEP eMapPA
Pennsylvania DEP's interactive web mapping application showing permits, facilities, monitoring sites, abandoned mines, and impaired waters statewide.
Maps & Data
rolling
U.S. EPA
EPA How’s My Waterway
EPA tool that provides plain-language water quality information for any local waterway in the U.S. based on state…
Maps & Data
rolling
U.S. Geological Survey
USGS National Water Information System (NWIS)
Comprehensive USGS database providing real-time and historical streamflow, groundwater, and water quality data for sites nationwide.
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…