"Yorba Linda is a small, sunny city southeast of Los Angeles. It’s perhaps best known for being the birthplace of President Richard Nixon. But in the past few years, Yorba Linda has picked up another distinction: It’s home to the nation’s largest per- and polyfluoroalkyl (PFAS) water treatment plant of its kind, according to the city."

"Energy businesses and farmers in western Pennsylvania are struggling because of prices, an issue that has not figured prominently in the campaigns of Donald J. Trump and Kamala Harris."

"We toured a facility in Northern Virginia to see how it works and to understand why water use and energy consumption are such a concern."

"The U.S. Food and Drug Administration will investigate the ingredients in tampons, after a study released earlier this summer found toxic metals in products from over a dozen popular brands."

"Officials warned people to stay out of the ocean at several beaches in Maryland, Delaware and Virginia after they said medical waste, including hypodermic needles, washed ashore. The source of the waste was under investigation."

"A massive pipeline fire sent a pillar of flame towering over some Houston suburbs on Monday as first responders evacuated a surrounding neighborhood and tried to keep more nearby homes from catching on fire."

"A tiny, vibrant world thrives along the rocky bottom of most streams. As sunlight filters through the water, mayfly nymphs, no larger than your fingernail, cling to algae-coated cobbles. Six spindly legs anchor them against the current, while feathery gills wave gently, drawing oxygen from the flowing water."

"Rust-colored piles of mine waste and sun-bleached wooden derricks loom above the historic Colorado mountain town of Leadville — a legacy of gold and silver mines polluting the Arkansas River basin more than a century after the city’s boom days."

"EPA has issued a violation notice to the operator of the country’s first carbon dioxide injection wells for permanent storage, alleging that the company hasn’t complied with its federal permit."

"A federal appeals court is giving EPA a second chance to justify its rule targeting smog-forming pollution that crosses state lines after the Supreme Court froze the regulation in June."