.the states health department says the water was contaminated with a potentially harmful chemical, mchm... >> a federal investigation is on-going - but this spill was just the most visible of many incidents in west virginia - where, in the past decade, the coal industry has recorded thousands of water violations. fault lines has come here to find out how the state's main industry affects its most vital resource. >> little testing have been done on the chemical that leaked from these tanks into the river just below. after the spill freedom industries declared bankruptcy and they're supposed to remove the tanks from the bank, but a lot of people want the tanks to remain there - because they say they're the best evidence of what is a crime scene. officials say the water is now safe to drink. but some don't believe them. we've come to meet a group of volunteers who've been distributing clean water to people who still don't trust the tap water. twice a week, they make a 2 hour trip to fill a 400 gallon container with clean spring water. >> three hundred thousand people plus have got poisoned