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

A white egret flying over a wetlands area

Tracking 20 years of productivity in tidal wetlands

A new study suggests warming temperatures and increased solar radiation have boosted carbon fixation in tidal wetlands across the country.
An illustration of a house with solar panels and an EV charging station

The overlooked wiring problem in the clean-energy transition

As more households add solar panels, batteries and heat pumps, researchers at Purdue found that running them all on DC power — not the AC current from the wall — could cut energy use and emissions.

A person tossing a bucket full of grapes into a larger container

Drought shrivels French wine harvest prospects

France's scorching summer is stunting grape growth in wine regions including Champagne, Bordeaux and Burgundy, threatening a smaller crop and bringing one of the earliest harvests on record.

Pump-jack mining crude oil against the sunset

Fuel on the fire: Why oil companies are profiting as the world gets dangerously hot

The scientific consensus is that burning fossil fuels drives the climate crisis, yet the world’s biggest oil companies are planning to increase production.

President Trump smiling while displaying a recently signed executive order

Trump wants to fast track AI

There are plans for more than 70 gas-fired power plants across the U.S. to privately serve data centers.

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.