Eleven dams in the Delaware River Basin were removed last year, in a move that advocacy groups say will improve conditions for wildlife.

The northern snakehead is spreading fast through U.S. waterways including in the upper Delaware River, and it’s not just an ...

Parts of the Delaware River have low dissolved oxygen levels caused by ammonia discharges from wastewater facilities.

State officials are weighing listing the tiny birds as an endangered species, a decision that could have big implications for the farming and renewable energy-focused county.