EPA has reissued the operating permit for the world's largest sewage treatment plant -- Blue Plains, which handles sewage from most of the DC metro area. Despite huge improvements in the Potomac River since the 1960s, Blue Plains needs to reduce its nitrogen discharge another 45 percent to protect the Chesapeake Bay.

"Candidates are lining up behind the issue of gas drilling as the controversial method called hydrofracking takes center stage this election season in the Finger Lakes region."

"The story of Hilmar is a classic tale of a company growing rapidly, bringing good jobs but also environmental threats to a rural farm community. In an ironic twist, though, it isn’t corporate outsiders pitted against town residents; the owners of Hilmar Cheese are descendants of the community’s founding families. Much of the well water around the cheese plant, located in the agricultural heart of California, isn’t fit to drink. And Hilmar Cheese is the likely culprit, new documents show."

"The Environmental Protection Agency sent letters to nine drilling companies on Thursday requesting detailed information about the chemicals contained in fluids used to crack open underground rock formations in the hunt for oil and natural gas."

Three environmental groups have issued a report detailing some 39 cases across the U.S. where pollution from the ash left from coal-burning electric power plants has cause pollution that often threatens human health. Now as EPA moves to close the electric utilities' longtime exemption from hazardous waste laws, industry lobbyists may have quietly put the fix in at the White House Office of Management and Budget.

"Regulators who are supposed to police offshore oil and gas drilling are spread too thinly, poorly trained and hampered by outdated technology, according to a study by an Interior Department review board appointed after the BP oil disaster in the Gulf of Mexico."

The release of a white, powdery catalyst from a Chalmette refinery that blanketed areas southeast of New Orleans on Monday has prompted a class action suit.

"Lawns may turn more brittle and yellow, but lakes, bays and marshes could become a lot cleaner under a bill making its way through Trenton that would ban many lawn care products on the shelf today."

"Oxygen levels fell significantly in deep-sea areas of the Gulf of Mexico contaminated by oil plumes from the BP spill. But although researchers found a 20% decline in dissolved oxygen, the drop was not steep enough to create biological 'dead zones' that some scientists feared might form in the wake of the BP disaster." Those were the findings of a government study.

"New oil and gas drilling is probably the most visible activity people associate with threats to groundwater in Texas. But it's not usually the source of known contamination, according to state records. Instead, old or abandoned oil and gas wells, petroleum storage facilities and even existing water wells are most frequently identified as problems."