Scientists investigate ocean pollution from Los Angeles wildfires

Wildfires that scorched coastal communities near Los Angeles have sent ash, heavy metals and hazardous debris into the Pacific Ocean, raising concerns about water safety and marine life.

Dorany Pineda reports for The Associated Press.


In short:

  • The Palisades and Eaton fires burned thousands of homes and businesses, releasing pollutants like lead, asbestos and plastics into the ocean.
  • Scientists detected fire debris up to 100 miles offshore and are studying how deep and far contaminants have spread.
  • Officials are testing water for heavy metals, microplastics and other toxic compounds while working to prevent further pollution from storm runoff.

Key quote:

"Reports are already showing that there was a lot of lead and asbestos in the ash. This is really bad for people so it's probably also very bad for the marine organisms."

— Julie Dinasquet, marine ecologist, Scripps Institution of Oceanography

Why this matters:

Wildfires don’t just destroy land — they also threaten ocean ecosystems. When homes and vehicles burn, they release toxic substances that can harm marine life and contaminate seafood. Rainfall can wash these pollutants into the ocean, compounding long-term risks. Researchers are trying to understand how urban fire debris affects water quality and whether it enters the food chain.

Read more: Toxic pollution persists after Los Angeles wildfires devastate communities

Firefighter manning a hose and training water on a blaze

The Trump administration upended how we fight wildfires. Then came the West’s worst fire season in years

WyoFile joined a coalition of nonprofit newsrooms in six Western states to examine how the changes are impacting our ability to fight fires amid increasingly destructive conditions.
Coal-fired power plant generation

MAHA moms take on coal

Some leaders of the health movement are challenging a pillar of the president’s energy agenda.
A person gesturing at another person with a court gavel in front of them

It just got way easier to sue fossil fuel companies over climate change

For years, industry has argued you can't prove which company caused which disaster. A new study says otherwise.
A path through low bushes with snowy hills in the background

Plant life in the warming Arctic alters lush knee-high jungle

Alaska's North Slope tundra may look desolate, but crouch down and you'll see a lush jungle. It's just so small, it's almost all below your knee.
A woman working with a laser in a lab

US companies are on the cusp of big climate solutions. Thank the government

The Department of Energy’s moonshot funding program is working. President Trump seems inclined to keep it.
A marina with boats and a forest and mountains in the background

Urban heat’s overlooked fix: Greening the land upwind of cities

A study published in Nature Cities suggests that forests placed strategically outside urban cores can lower temperatures across much of a city.
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.