there's more chemicals in there prprobably thahan you'd have i e avererage chemicalal factory. ad it's all leachingng into ththe ground to whatever mine p pool is undederneath, tgod knowsws whose water supply where. >> we're talking about a quarter of a million people live here. now, people aren't drinking all that t mine pooool water. they'e drinking reservoir water that the mine pool helps feed. the water that flows into those reservoirs comes from groundwater and from mine pools and from springs that come out of the sides of mountains. and the danger is if you contaminate too many of those sources, then you have a health threaeat. >> jusust as in juliliette, geo, people hehere are also gettining sick. if you type in hazleton, it does c come up cancer capital of pennsylylvania. >> this is ground zero for the polycythemia vera cancer investigation. >> called pv for short, polycythemia vera is a rare form of blood cancer in most of the u.s. but here, there's a confirmed cluster of pv cases. >> in 2004, we learned that there were 67 diagnosed cases of polycythemia vera, which ul