"When the Conowingo Dam opened to fanfare nearly a century ago, the massive wall of concrete and steel began its job of harnessing water power in northern Maryland. It also quietly provided a side benefit: trapping sediment and silt before it could flow miles downstream and pollute the Chesapeake Bay, the nation’s largest estuary."

"All of Mississippi's Gulf Coast beaches have been closed for swimming as the expanding bloom of toxic blue-green algae blankets the state's waters."

"Environmental groups say a new rule from the agency eliminates one of the only tools providing communities near CAFOs with information about toxic substances in the air."

"A fire in Kentucky destroyed a warehouse containing about 45,000 barrels of Jim Beam bourbon after officials let the blaze run its course to avoid ethanol contamination in a nearby creek that runs into the Kentucky River."

"In rolling out the final version of its contested sequel to the Obama-era Clean Power Plan last month, EPA left behind a big chunk of unfinished business."

"A coalition of green groups sued the Environmental Protection Agency (EPA) late Monday over a rule that lifts requirements for major farms to report the pollution they emit through animal waste."

"The Trump administration said Tuesday that it won’t require electric utilities to show they have money to clean up hazardous spills from power plants despite a history of toxic coal ash releases contaminating rivers and aquifers."

"In the early months of the Trump administration, automakers pleaded for — and appeared set to receive — some relief from fuel economy standards that they said were too difficult to meet. But newly released government emails show how a coalition of groups that reject established climate science quickly muscled into the picture, urging the administration to go much further and roll back the rules entirely and characterizing the automakers as their opponents in achieving that goal."

"Federal public health officials are urging people to take precautions to protect themselves against a microscopic parasite that can live for days in swimming pools and water playgrounds and cause severe intestinal problems."

"The explosions that destroyed part of the historic oil refinery on Philadelphia's south side have thrown a wrench into the ongoing effort to clean up decades' worth of soil and water pollution at the site."