"The Key Ingredient in Oil Drilling? Water"
"They say oil and water don't mix, but when it comes to oil and gas drilling, water and oil are practically joined at the hip. It takes millions of gallons of water to drill a well. Water is the 'hydraulic' in the hydraulic fracturing process used to release oil and gas deposits. Disposing of wastewater is a costly challenge for drillers. And, at every step along the way, preventing groundwater contamination is the paramount concern for inspectors and regulators."