Ecoregions of Pennsylvania Level III
2010. U S Environmental Protection Agency. Ecoregions by state were extracted from the seamless national shapefile. Ecoregions denote areas of general similarity in ecosystems and in the typ...
Ecoregions of Pennsylvania Level IV
2010. U S Environmental Protection Agency. Ecoregions by state were extracted from the seamless national shapefile. Ecoregions denote areas of general similarity in ecosystems and in the typ...
Ecoregions United States (Omernik)
2003. U S Environmental Protection Agency. This map layer shows Omernik's Level III ecoregions, derived from a 1:7,500,000 map created by J.M. Omernik in 1987 and from refinements of Omernik...
EPA Renewable Energy Sites: Pennsylvania
2008. U S Environmental Protection Agency. The U.S. Environmental Protection Agency (EPA) Office of Solid Waste and Emergency Response (OSWER) Center for Program Analysis (OCPA) is encouragi...
Toxic chemical Release Inventory data for Pennsylvania
1994. U S Environmental Protection Agency. This data layer includes point locations for Toxic Chemical Release Inventory (TRI) data from the Environmental Protection Agency's Toxic Release I...
