Scientists have found that many inland waterways are getting saltier, and that’s helping to mobilize heavy metals and other chemicals from the soil, creating potentially dangerous combinations.

New analysis reveals that we have much less water in our aquifers than we previously thought — and the oil and gas industry could put that at even greater risk.

We’ll have to contend with new limits to the Clean Water Act, growing threats from climate change and fixing our aging infrastructure.

Drought can lead to anger and even violence. Climate change will make things worse. One cop is on the beat.

From California to Maryland, dams are being removed to help fish, improve safety and boost recreation.

In many Mexican cities, water is treated as a political bargaining chip – a favor that public officials can trade for votes, bribes or power.

Water managers say no, but Native American tribes are keeping careful watch on the “water that connects us.”

State regulators tried to get the future president to address problems on two golf courses. They got a lesson in how he handles regulatory challenges.

We mapped out where the drilling could take place — and how it overlaps with the critical habitats of the most sensitive species at risk.

America’s waters are contaminated by poop and bacteria. Use our maps to find the worst waste locations near you.