A 27-mile stretch of the Delaware River in the areas of Philadelphia and Camden is not safe for swimming. UPenn researchers evaluate how to improve water quality.

An increasingly common scamming tactic is a phone call from a number with a fake caller ID that reads “PECO,” the company said.

Advocates are encouraged by the new mayor’s early plans to clean up the city. But some are skeptical about her pick to lead the efforts.

The newly approved offshore wind farms will be located about 40 miles off the N.J. coast and generate enough electricity to power 1.8 million homes.

Drexel researchers say self-heating concrete could replace road-damaging salt.

Companies must now notify the EPA if they want to resume the production of certain PFAS chemicals.

A 15-cent bag fee passed City Council, then died on Mayor Kenney’s desk. Proponents aren’t giving up, but the new mayor’s stance isn’t clear.

In 2023, the city reached a benchmark of nearly 250 electric vehicles. That’s out of a fleet of over 5,000 vehicles.

Delaware report encourages the state to approach offshore wind with “flexibility” in an uncertain market.

University of Delaware is one of five institutions across the U.S. that received funding from the EPA to study how to measure methane in landfills more accurately.

“We're in an emergency place,” one incoming council member said. “We've got to take emergency, immediate actions.”

City Hall, the criminal justice center, and several homeless shelters could get HVAC upgrades, LED lighting, or solar panels.

Philadelphia takes steps toward renewable energy goals with a solar farm in Adams County.

Scientists say human-caused climate change and El Niño contributed to a record warm year globally.

Climate change took a big toll on the Philly region this year, featuring everything from wildfire smoke to serious flash floods. And yet, climate solutions abound.