"Citing 'extensive corrosion,' federal investigators said an MCHM chemical storage tank at the Freedom Industries site along the Elk River likely was leaking prior to the Jan. 9 spill that contaminated the drinking water for 300,000 people across the region."

"Scientists found intersex fish in three river basins in Pennsylvania, a sign that the water may be tainted with chemicals from human activity."

"A Pennsylvania gas company offers residents cash to buy protection from any claims of harm."

"Scientists are predicting that the Chesapeake Bay's oxygen-starved "dead zone" will be slightly larger than average this summer."

"Freedom Industries has terminated the contractor in charge of the cleanup of its Elk River chemical tank farm, just days after two incidents in which stormwater overflowed a collection ditch at the high-profile site, sending potentially contaminated runoff pouring into the river."

"Government officials involved in the multistate Chesapeake Bay cleanup pledged Monday to broaden and accelerate the long-running effort, including a vow to address the impacts of climate change on the ailing estuary."

"Despite early progress reducing Chesapeake Bay pollution, levels of a key pollutant, phosphorus, have not come down in many rivers in the past decade — and are actually rising in several, officials say."

"Pennsylvania is falling far short of goals for reducing agricultural water pollutants and urban and suburban runoff that are damaging the ecological health of the Chesapeake Bay, according to a new report by the Chesapeake Bay Foundation and Choose Clean Water Coalition."