In this March 29, 2013 photo, a worker checks a dipstick to check water levels and temperatures in a series of tanks at an Encana Oil & Gas (USA) Inc. hydraulic fracturing operation at a gas drilling site outside Rifle, Colorado. Hydraulic fracturing, or “fracking,” can greatly increase the productivity of an oil or gas well by splitting open rock with water, fine sand and lubricants pumped underground at high pressure. Companies typically need several million gallons of water to frack a single well. In western Colorado, Encana says it recycles over 95 percent of the water it uses for fracking to save money and limit use of local water supplies. (AP Photo/Brennan Linsley)

Associated Press
In this March 29, 2013 photo, a worker checks a dipstick to check water levels and temperatures in a series of tanks at an Encana Oil & Gas (USA) Inc. hydraulic fracturing operation at a gas drilling site outside Rifle, Colorado. Hydraulic fracturing, or “fracking,” can greatly increase the productivity of an oil or gas well by splitting open rock with water, fine sand and lubricants pumped underground at high pressure. Companies typically need several million gallons of water to frack a single well. In western Colorado, Encana says it recycles over 95 percent of the water it uses for fracking to save money and limit use of local water supplies. (AP Photo/Brennan Linsley)
In this March 29, 2013 photo, a worker checks a dipstick to check water levels and temperatures in a series of tanks at an Encana Oil & Gas (USA) Inc. hydraulic fracturing operation at a gas drilling site outside Rifle, Colorado. Hydraulic fracturing, or “fracking,” can greatly increase the productivity of an oil or gas well by splitting open rock with water, fine sand and lubricants pumped underground at high pressure. Companies typically need several million gallons of water to frack a single well. In western Colorado, Encana says it recycles over 95 percent of the water it uses for fracking to save money and limit use of local water supplies. (AP Photo/Brennan Linsley)
View Comments (0)