EPA's work on possible limits to hexavalent chromium (the 'Erin Brockovich' contaminant) in drinking water may spark a battle like the one over arsenic.

"The Obama administration announced Wednesday that it will impose stricter pollution controls on millions of acres of wetlands and tens of thousands of miles of streams."

"One of U.S. EPA's longest ongoing enforcement matters is about to be wrapped up after a federal jury ruled this week that the Clean Water Act protects 46 acres of wetlands filled in by a Massachusetts cranberry farmer more than two decades ago."

"The Philadelphia Water Department announced yesterday that it is enhancing its testing procedures and reviewing treatment technology after federal environmental officials found radioactive iodine in the city's drinking water."

"A year after the worst oil spill to strike U.S. waters, oyster beds are struggling along the Gulf of Mexico, the dolphin population is experiencing what the federal government calls an 'unusual mortality event,' and red snapper with rotting fins are showing up on fishing lines."

"Two areas of Alaska's Cook Inlet will be designated as critical habitat for the endangered Cook Inlet beluga whale, NOAA's Fisheries Service, Alaska Regional Office announced [April 8]."

"Millions of gallons of radioactive water have leaked from nuclear power plants throughout the U.S. since the 1970s, threatening water supplies in New Jersey and other states, an Asbury Park Press investigation found."

""U.S. water utilities have known about the prevalence of a likely carcinogen in water sources for seven years and have failed to share that information with the public, according to an advocacy group, which released today a 2004 industry study of hexavalent chromium."

"As the operator of the Fukushima Daiichi Nuclear Power Station continued to dump radioactive water into the Pacific Ocean on Tuesday, company officials said that seawater collected near the facility contained radiation several million times the legal limit."

"The Government Accountability Office is preparing to issue a report that rebukes the Centers for Disease Control and Prevention for saying in 2004 that elevated levels of lead in the District’s tap water did not pose a public health threat and for failing to quickly clarify its findings as complaints mounted."

"Gov. Terry Branstad and state lawmakers are working to put the state agriculture department in charge of key water-quality programs, a move critics fear will undercut the state's ongoing struggle to clean waterways choked with silt, algae and worse."

"Libya warned on Sunday that NATO-led air strikes could cause a 'human and environmental disaster' if they damaged the country's massive Great Man-Made River (GMMR) project."

"With birds chirping and temperatures warming , spring is finally in the air. But for University of Toronto Scarborough (UTSC) environmental chemist Torsten Meyer, springtime has a dark side."

"A Naval training exercise that included an underwater blast off San Diego's coast has been linked to at least three dolphin deaths earlier this month, prompting a probe into whether the military violated the federal law that protects marine mammals."

"It has killed millions of fish and hundreds of dolphins and manatees. It has ruined countless Florida beach vacations. And it has left people with respiratory problems gasping for air. Yet until now, how Red Tide's poisons worked remained something of a mystery."