A plan to remove nearly 200 trees from Pasadena Unified School District campuses has angered some local residents.

School district officials say 193 trees across 11 campuses need to be removed to clean up soil contaminated by the Eaton Fire.

Residents say they were not properly notified about the project, and some are pushing for ways to remediate the soil without taking down so many trees.

Pasadena resident Paloma Muñiz Ochoa spent eight hours in an oak tree slated for removal at the district’s headquarters.

“There's been a lot of destruction, and there's no reason to destroy more,” said the 17-year-old as she sat at the base of the tree on Tuesday.

At another side of the district’s administrative building, certified arborist Sabine Höppner stood guard at the base of two huge sycamore trees, also on the chopping block. She estimated them to be more than 100 years old.

"These are so important to the whole neighborhood," she said. "They're a hub for birds. Raptors land in them, owls perch in them at night. You can find the owl droppings all throughout here.”

More than a dozen trees have been removed already, mostly at San Rafael and Washington elementary schools. Opponents of the plan say they want the soil cleaned without the removal of so many trees.

“We in Altadena lost so much of our tree canopy to the Eaton Fire that the idea of taking additional trees away, especially mature trees, is just so hard to think about,” said Ariane Vielmetter, who lost her home in the Eaton Fire.

Her son lost his school and now attends a PUSD elementary school, though not one of the ones affected by the tree removal plan.

Officials, however, say they’ve exhausted all other options.

“After months of consultation with [the state’s Department of Toxic Substances Control], PUSD determined that removing the selected trees is the safest and most appropriate course of action for schools to complete remediation and reopen as quickly as possible,” the district wrote in a statement.

PUSD’s superintendent and the Department of Toxic Substances Control declined to be interviewed for this story.

How we got here

Just a few weeks after the fires started, PUSD entered into a “voluntary cleanup agreement” with the Department of Toxic Substances Control, or DTSC, to address potential contamination at 15 campuses. The state agency oversees removal of such contaminants at places like schools.

Pasadena Unified then hired environmental consulting firm Verdantas to test soil at those campuses.

Last May, the school district released the results of those soil tests, which found elevated levels of toxic metals, primarily lead, at 13 campuses.

The district said in a statement Monday that over the last year, it has “met extensively with the DTSC” to address the contamination.

“These detailed discussions encompassed review of the types of toxins identified, and site-by-site and test by test assessments were performed to evaluate various soil removal approaches,” the district wrote.

At a Pasadena City Council meeting Monday, several councilmembers and Mayor Victor Gordo said they planned to look into what the city’s role may be in approving the removal of certain protected trees.

“As far as the trees go, if there's anything that the city can do to stop this process until we have a better understanding, if they need to come through us for approval,” Councilmember Tyron Hampton said.

Pasadena Unified’s goal is to clean up the remaining campuses before students return from summer break. The estimated cost is about $6.6 million.

What’s next 

Some residents and tree advocates are urging the school district to consider other ways to remediate their campuses, without cutting down so many trees. That can include phytoremediation, which uses plants to clean up toxins in the soil.

Chris Shogren, an environmental horticulture advisor with the University of California cooperative extension, said such natural remediation strategies can be effective, but are more complex to design and can take months to years to complete.

“Remediation is just a really tough task,” Shogren said. “If you want something immediate, you really do just have to come in, remove the soil and replace it. Everything else is going to take time for it to actually work.”

Timing is short. The district said it’s required by the DTSC to carry out the bulk of the removal and remediation when students aren’t on campus “for safety reasons,” wrote the district’s Superintendent Elizabeth Blanco and facilities director Michael Dunning in a recent statement.

Shogren said that some trees currently slated for removal may be able to be saved — for example, there’s less risk of toxic exposure if they’re emerging from concrete rather than bare soil — but that ultimately it depends on testing.

“It really should be based on the soil reports, so you’re going highest exposure risk to lowest exposure risk,” he said.

The removal of so many trees would be “unfortunate,” Shogren said, but he hopes that what comes next can better serve future generations of children and wildlife.

“We’re going to have to rebuild and redo things at some point,” he said, “and the sooner we start, the sooner those trees are going to start maturing and providing all those benefits that we want from them.”

Corrected June 16, 2026 at 8:31 PM PDT

A previous version of this article said Ariane Vielmetter's son attends high school. It should have said elementary school.

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