Saltwater encroaches on Delaware River

Drought and rising sea levels have pushed saltwater further up the Delaware River, raising concerns about drinking water supplies for millions in the Philadelphia area and beyond.

Mike Catalini and Brittany Peterson report for The Associated Press.


In short:

  • A drought in the Northeast and rising sea levels have pushed the salt front 20 miles upstream near Philadelphia International Airport, closer to drinking water intakes.
  • Officials are releasing water from reservoirs to manage the salt front, but prolonged drought could worsen the situation.
  • The Delaware River Basin Commission is exploring climate adaptation strategies, including increased storage and conservation efforts.

Key quote:

“We get nervous when it starts to get up near Philadelphia. It’s only 18 miles right now from the drinking water intakes.”

— Amy Shallcross, water resource operations manager at the Delaware River Basin Commission

Why this matters:

Saltwater intrusion poses a major risk to the drinking water supply for 14 million people. With climate change amplifying droughts and sea level rise, better water management and conservation are critical to ensuring long-term water security.

Great Sand Dunes National Park sign
Credit: Jeffrey M. Frank/BigStock Photo ID: 28064495

Trump administration to scrap rule encouraging conservation

The Biden-era measure was intended to protect millions of acres from industrial development and the effects of climate change.
The construction of a warehouse or data center in a dry location
Credit: ungvar/Big Stock Photo ID: 474261073

EPA plan would let work start on data centers, power plants before air permits

Developers could start building "non-emitting" components ahead of air permitting under Administrator Lee Zeldin's proposal.
Cattle skull sitting on dry earth indicative of severe drought and livestock death

Could an El Niño this year match an 1877 event that killed millions?

The climatic phenomenon is expected to return this year, but a lot has changed since what might have been the worst environmental disaster in human history.
Filling and transportation of water bottles at lake for women to irrigate crops
Credit: gillespaire/BigStock Photo ID: 63108250

Some climate shocks can increase the likelihood of war

Researchers warn against oversimplifying climate change’s role in conflict. But some conditions can increase the likelihood of violence, a new study finds.

A row of industrial batteries

For California farmers, a clean-energy dilemma

How close to prime farmland should large-scale battery facilities be built?
A view of a housing development with a wildfire and smoke in the background

Poll: Most Coloradans say climate change is harming human health

More than 1 in 3 Coloradans say they or a loved one has experienced a climatechange-related health impact, according to new survey data.

A child holding a protest sign that says Act Now for a Healthy Future

Climate Reality group in North Carolina to fight PFAS and more

A new Wilmington, NC chapter of the Climate Reality Project aims to teach people on how to engage their neighbors and officials on important environmental issues.

From our Newsroom
Multiple Houston-area oil and gas facilities that have violated pollution laws are seeking permit renewals

Multiple Houston-area oil and gas facilities that have violated pollution laws are seeking permit renewals

One facility has emitted cancer-causing chemicals into waterways at levels up to 520% higher than legal limits.

Regulators are underestimating health impacts from air pollution: Study

Regulators are underestimating health impacts from air pollution: Study

"The reality is, we are not exposed to one chemical at a time.”

Pennsylvania governor Josh Shapiro speaks with the state flag and American flag behind him.

Two years into his term, has Gov. Shapiro kept his promises to regulate Pennsylvania’s fracking industry?

A new report assesses the administration’s progress and makes new recommendations

silhouette of people holding hands by a lake at sunset

An open letter from EPA staff to the American public

“We cannot stand by and allow this to happen. We need to hold this administration accountable.”

wildfire retardants being sprayed by plane

New evidence links heavy metal pollution with wildfire retardants

“The chemical black box” that blankets wildfire-impacted areas is increasingly under scrutiny.

Stay informed: sign up for The Daily Climate newsletter
Top news on climate impacts, solutions, politics, drivers. Delivered to your inbox week days.