"Drilling Mishaps Damage Water In Hundreds Of Cases"
"When a pipeline break in North Dakota spilled salty, toxic drilling wastewater into a tributary of the Missouri River last year, it was national news. But it was only one of more than 640 oil and gas spills that affected groundwater or surface water in some way in 2015, according to a review of state and federal records by EnergyWire. Such spills can contaminate water with oil, salt, metals and even radiation."