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With PFAS, the forever chemicals, showing up in drinking water, researchers in Virginia want to know if they're building up in fish as well.

Pacific Northwest tribes are pressuring President Biden to make good on his pledge to uphold treaties in Indian Country and remove four large dams on the Snake River.

Triathlon and marathon swimming are to take place in the Seine, where it has been illegal to swim for more than a century. The water has tested unsafe in recent weeks, and cleaner on other days.

The largest water utility in Iowa is sounding alarms that it won't be able to keep up with cleaning the water for more than 600,000 customers as extreme weather swings become more common.

This has been the deadliest year ever for migrants trying to cross the U.S.-Mexico border. Hundreds have drowned in the Rio Grande or perished from extreme heat in failed smuggling attempts.

Of the 177 environmental activists killed around the world last year, 60 were murdered in Colombia, says the advocacy group Global Witness. In most cases, no one is tried or convicted.

In the town of Juntas, in the city of Buenaventura, Colombia, the community gathers for Holy Week every year to celebrate the Manacillos festival, an ancestral ritual originating in the upper part of the Yurumangui River.

Atmospheric rivers are impacting the long-term drought in California.

Back in 1969, a polluted river in Ohio caught fire. The environmental disaster led Congress to enact the Clean Water Act in 1972.

A group of students contemplates the dilemma facing Meriwether Lewis and William Clark in 1805: where to spend the winter after they had reached the Pacific Ocean. Colin Fogarty of Oregon Public Broadcasting reports.