The U.S. Environmental Protection Agency today announced it had ended testing of drinking water in a northeastern Pennsylvania community and declared it safe to drink, despite residents' complaints of pollution from natural gas drilling.

The EPA began testing four wells in Dimock late last year after some residents complained of illnesses involving their nerves, stomachs and skin. They blamed Houston-based Cabot Oil & Gas Corp. for contaminating their water with chemicals used in hydraulic fracturing, or fracking.

The Oscar-nominated 2010 documentary Gasland featured Dimock residents lighting tap water on fire. Geologists say such methane contamination can occur naturally in well water. The area, in Susquehanna County, sits atop a section of the Marcellus Shale formation, which spans several Mid-Atlantic states.

Between January and June, the EPA tested and re-tested private wells serving 64 homes. In May, the agency issued preliminary results that showed no signs of contamination from fracking.

BLOG: EPA: Pa. village's water not polluted by gas fracking

"The sampling and an evaluation of the particular circumstances at each home did not indicate levels of contaminants that would give EPA reason to take further action," Regional Administrator Shawn Garvin said today in a news release. "Throughout EPA's work in Dimock, the Agency has used the best available scientific data to provide clarity to Dimock residents and address their concerns about the safety of their drinking water."

In declaring the water safe, the agency also said it would stop providing water to four homes.

One resident rejected the agency's all-clear.

"I don't care what EPA says. The water is still polluted," Ray Kemble told the Associated Press. "Do something about it."

Cabot's president and CEO welcomed the findings.

"The conclusions reached by the EPA mirror those previously made by the Pennsylvania Department of Environmental Protection and Cabot," Dan Dinges said in a statement. "I am satisfied that concerns over water quality have been studied to the highest levels of scrutiny."

The EPA has posted key documents pertaining to oil and gas development in the Mid-Atlantic region.