"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 good news is that the Gulf of Mexico dead zone, expected to be bigger this year because of high runoff and the BP spill, did not set a record for size. The bad news is that oxygen levels in the dead zone that did develop this year are extremely low.

"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."

"Rising sea waters may threaten U.S. coastal cities later this century, while the Midwest and East Coast are at high risk for intense storms, and the West could see compromised water supplies."

"A giant underwater 'dead zone'in the Chesapeake Bay is growing at an alarming rate because of unusually high nutrient pollution levels this year, according to Virginia and Maryland officials. They said the expanding area of oxygen-starved water is on track to become the bay’s largest ever."

"Documents and interviews reveal that one Pa. water utility has already leased its watershed to gas drillers — and many others are being courted."

"A government report released Tuesday says states are underreporting violations of federal drinking-water standards, preventing the Environmental Protection Agency from enforcing rules aimed at protecting public health."