Not all information is complete yet, but EPA is well on its way. State base maps for my area include a color landform atlas of Pennsylvania from the Johns Hopkins University's Remote Sensing Group. Environmental quality maps are available from the National Atmospheric Deposition Program. Pennsylvania has a relief map, county map, and satellite image. Also, depending on where you live and how much data has been assembled, you'll find links to information on water, such as community water sources, water dischargers, stream flow, water resources and more.
Additional information is available in land, people and land.
Try this EPA site . Used under License.