"An analysis of drinking water sampled from three homes in Bradford County, Pa., revealed traces of a compound commonly found in Marcellus Shale drilling fluids, according to a study published on Monday."

"SHAFTER, Calif. — On a map he keeps in his office, Tom Frantz, an environmental activist and retired math teacher, notes a spot near his home that he says is within a five-mile radius of 10 big dairy farms and about 60,000 cows. This town, in the very fertile but poor and badly polluted San Joaquin Valley in California, is near the heart of dairy country in a state that produces 20 percent of America’s milk."

"More than 300,000 gallons of gasoline have leaked from Texas-based energy company Kinder Morgan’s pipeline in Belton, S.C., since a structure failure in December, according to the Savannah Riverkeeper."

"Even though Maryland has yet to permit any hydraulic fracturing for natural gas, emissions linked to the controversial drilling technique have been detected in the air in Baltimore and Washington, according to a new study."

"CUPERTINO -- The Lehigh Hanson cement plant, a longtime producer of Silicon Valley building materials but also a significant polluter, will pay $7.5 million as part of an agreement with the U.S. Environmental Protection Agency to settle charges it dumped millions of gallons of toxic wastewater into a nearby creek."

"Duke Energy, the largest electric utility in the US, has agreed to provide dozens of families in North Carolina with bottled water after state testing found private wells near sites where the company stores coal waste contaminated with potentially toxic chemicals."

"Scientists, planes and instruments descend on San Juan Basin to find roots of the massive greenhouse gas hotspot."

"NEW YORK — A clean-water advocate took an Earth Day swim in the polluted Gowanus Canal, a federal Superfund site."

"Lawsuit helped force an update of emissions standards for dangerous chemicals that went unchanged nearly 30 years."