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.

Two western states have launched new challenges to the Roadless Area Conservation Rule, which helps protect some of the country’s most important public lands.

After decades of rumors and searches, the existence of a two-foot-long amphibian called “the reticulated siren” has finally been confirmed.

A newly discovered plant genus could be wiped out by dams and mining. Could giving it a name save it from extinction?

Sharon Levy’s new book offers a fascinating history of wetlands, their human-caused decline and our growing understanding of why we need to restore them.

They tried to bury the report by releasing it on Black Friday, but the threats we face — and possible solutions we can take on — are still very real.

An expanding petrochemical industry, thanks to fracked shale gas, could have big consequences for a warming planet.

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