USGS

USGS Chesapeake Bay Activities
Most of central Pennsylvania resides within the Chesapeake Bay watershed.

Coal Mine Drainage Projects in Pennsylvania
With abandoned coal mines across the state sending toxins into the water supply, this is a crucial issue for many in the state.

Science in Your State: Pennsylvania
Earthquakes in Pennsylvania? They're small, but they happen! This site gives the updates on seismic and flooding activities in the state. Follow the link for Mineral Information to find out what else is being mined aside from coal (scroll down the page to "Publications" and "Links").