Colorado’s fracking regulations set for review

With the number of gas and oil wells being drilled in the Niobrara shale formation in Weld and Larimer counties expanding exponentially, concern has been rising about the safety of the chemicals and fluids being used to tap those deposits.

Oil and gas companies have been using hydraulic fracturing of rock formations to get at the deposits for decades, but the practice, commonly known as fracking, has become more widespread in recent years.

Environmentalists have raised concerns about some of the fracking fluids, which include chemicals that are either known or suspected carcinogens, according to a report issued by three U.S. House…