12/10/2025
Firefighters responding to the 2022 Hermits Peak-Calf Canyon Fire reported nearly 2,500 retardant drops as they fought the blaze that destroyed hundreds of homes in Northern New Mexico, according to data the federal Forest Service provided Source New Mexico.
Where those drops occurred — and what was in the retardant — is the subject of renewed interest after an independent geologic study discovered elevated levels of potentially dangerous contaminants, including arsenic, antimony and uranium, in 72 private wells in the burn scar, mostly in Mora County.
Kate Zeigler, the geologist who discovered the metals, has said fire suppressants are a likely culprit behind at least some of the contamination, noting that many of the newly discovered contaminants exist in fire retardant and are not naturally occurring.
She also stressed other possible sources of contamination, noting fire suppressants “are most likely not the sole and only source.”
Zeigler also reviewed the drop data and believes it could be incomplete. She is asking people who witnessed the fire to send any evidence they have of suppressant drops to her team. As she’s conducted tests, she’s heard multiple reports of retardant dropped in Monte Aplanado and near Morphy Lake, for example, areas that do not appear in the Forest Service data.
“We’ve been trying to chase down anecdotal stories of people coming back to a house coated in pink dust,” she told Source in an email, referring to the characteristic pink color of the retardant.
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