"The Environmental Protection Agency should order companies such as Schlumberger Ltd. and Halliburton Co. to disclose the hydraulic fracturing chemicals used in U.S. oil and gas drilling, advocacy groups said."

"The U.S. Environmental Protection Agency is overseeing an effort to determine the extent of contamination at a former uranium mining site on the Navajo Nation that marked a high priority for assessment."

Oil and gas executives have long claimed that there is no case in which hydraulic fracturing has contaminated a drinking water aquifer. But such a case exists. And one of the biggest bars to enumerating suspected additional cases is the oil and gas industry's refusal to allow disclosure of them -- a condition of court settlements with landowners.

"Brooklyn's Gowanus Canal, labeled 'one of the most contaminated bodies of water in the nation,' isn't just a filthy Superfund site. To urbanites, it's a little piece of the outdoors."

"New studies in California and Wisconsin reveal a dirty little secret: Out of sight, many urban sewer pipes are failing and germ-ridden filth is bleeding out."

"It is the nation's first public health goal for hexavalent chromium, made infamous in 'Erin Brockovich.' The goal isn't an enforceable standard but will help develop one, an official says."

"Critics are concerned that the B.C. government is allowing a natural gas company to draw water from a northern BC Hydro reservoir to use in a controversial technique called fracking."

West Virginia Gov. Tomblin's "administration weakened an executive order on the regulation of Marcellus Shale gas drilling just hours before the order was signed and publicly announced, according to records obtained under the Freedom of Information Act. ... The governor's office has refused to make public its correspondence with industry lobbyists who were helping craft state drilling policies."

"A federal appeals court ruling that would require Clean Water Act permitting for stormwater runoff on logging roads has sparked a political backlash, leading to congressional action and possible Supreme Court intervention."

"Teams tallying damage from an Exxon Mobil Corp. oil spill into the Yellowstone River have found contamination on roughly 60 percent of shoreline areas inspected downstream from the pipeline break, state and federal environmental regulators said Tuesday."