PITTSBURGH (AP) — Fourteen environmental groups have asked Republican Gov. Tom Corbett to reverse a recent change in how official notifications of possible water pollution related to Marcellus Shale natural gas drilling are handled. But state officials say the public still gets the information it needs.

The 14 groups claim the new policy would delay warning the public about pollution related to oil and gas drilling from a procedure known as hydraulic fracturing, or fracking, which involves blasting chemical-laden water deep into the ground.