"Out-of-sight septic systems — more than 100,000 of them in Volusia County and an estimated 2.7 million in Florida — add to growing concerns about the rising tide of nitrogen and other pollution feeding algae blooms and killing fish and sea grasses."

"Michigan Attorney General Dana Nessel said Wednesday she will move in June to shut a Great Lakes oil pipeline if the governor cannot reach a resolution with operator Enbridge, saying the state is in “great peril” the longer the oil continues to flow under a sensitive waterway."

"Los Angeles County sued Monsanto Co on Thursday, seeking to force the unit of Germany’s Bayer AG to help pay for reducing PCB contamination in dozens of bodies of water."

"New Hampshire has sued eight companies including 3M and the DuPont Co. for damage it says has been caused by a class of potentially toxic chemicals found in pizza boxes, fast-food wrappers and drinking water."

"A government watchdog group on Wednesday requested an investigation into the head of the Environmental Protection Agency’s (EPA) air office, arguing the Trump appointee violated an ethics pledge by meeting with former clients."

"When the Trump administration exempted parts of the Chicago area last year from federal limits on lung-damaging smog, it delivered a huge financial break to steel mills, chemical plants and other industries that are some of the region’s biggest polluters."

"Researchers have found high levels of radiation in giant clams near the Central Pacific site where the United States entombed waste from nuclear testing almost four decades ago, raising concerns the contamination is spreading from the dump site’s tainted groundwater into the ocean and the food chain."

"North Dakota oil drillers are falling far short of the state’s goals to limit the burning of excess natural gas at well heads, five years after the state adopted the rules to reduce the wasteful and environmentally harmful practice."

"A nonprofit that tracks pollution in the Chesapeake Bay lambasted Pennsylvania on Tuesday, saying that the state is failing to protect the nation’s largest estuary from farm manure and dirty stormwater."