CITIZEN POWER ALLIANCE

Pennsylvania environmental officials said natural gas and polluted drilling water are pouring from an out-of-control well in rural Clearfield County.

A one-mile radius of Moshannon State Forest was evacuated Friday morning after a gas well ruptured near the Punxsutawney Hunting Club.

The leak happened at a Marcellus drilling operation on McGeorge Road in the forest. The gas well is owned by EOG Resources , Inc., officials said.

Around 10:30 a.m., officials were checking camps to make sure all campers were evacuated around the site of the leak. Officials said they were dealing with gas leaking into the air.

According to state Rep. Bud George's office, initial reports from Process Equipment Manufacturers' Association said three of four wells were secured. The other well was releasing frack water and unignited wet gas, which caused the evacuation. Officials said an estimated 1 million gallons of frack water was uncontrolled as of 11 a.m. in the area of exit 111 on Interstate 80.

Hydraulic fracturing or "fracking" is the process of blasting millions of gallons of water deep underground to break up the shale and release the gas. Most of the frack water stays underground, but what comes up must be treated or disposed of in approved facilities.