Fresh Water

Some rivers and lakes wouldn’t be swimmable today without this critical law. But it could use a refresh to help meet our current challenges.

I became a plaintiff in a lawsuit for the Clear Lake hitch — a fish I’ve never seen. As the species quickly disappears, how much longer will it swim the waters of California?

Decades of studying polluted Piles Creek led to advances in our understanding of how pollution affects crabs, fish and shrimp, including those that we eat.

A new book explains why “Slow Water” projects can help us tackle our climate, water and biodiversity crises.

Mounting studies highlight greenhouse gas emissions from reservoirs, and now a coalition of environmental groups has called for regulatory action.

April’s best new eco-books look toward solutions to the extinction crisis, climate change, water shortages, environmental justice and more.

These aquatic heroes do so much to keep freshwater ecosystems healthy — and we’re killing them off at a record pace.

Ten bills in Congress would add conservation protections to 7,000 miles of river to safeguard drinking water, biodiversity and recreation.

Freshwater mussels are some of the most imperiled species in North America. Experts say we can change that by rethinking our infrastructure.

Conservationists, activists, scientists and other experts offered their insight into the year’s most pressing issues.