09/01/2026
California lawmakers are moving forward with legislation that would establish science-based standards for testing and clearing homes after wildfire contamination, including contamination from hazardous substances such as lead, asbestos, and other chemicals.
The issue gained attention after the devastating 2025 Los Angeles wildfires, which destroyed thousands of homes and left many standing properties contaminated by smoke, soot, ash and other combustion byproducts.
According to the California Department of Insurance, more than 42,000 insurance claims were filed following those fires, including more than 13,000 claims involving standing homes with smoke damage.
One of the bills moving through the Legislature, AB 1642, would require the Department of Toxic Substances Control to establish science-informed standards for investigating, testing and clearing properties for contamination following wildfires. The proposed standards would address substances including lead and asbestos, with additional standards for hazardous chemicals to follow.
A companion measure, AB 1795, would establish statewide standards for inspecting, testing and remediating residential properties affected by wildfire smoke and would require insurers to follow consistent remediation protocols.
As of Aug. 30, AB 1642 was still moving through the Legislature, with a final Assembly floor vote pending.
The legislation comes as California works to establish something that has been missing: a consistent, science-based way to determine what wildfire contamination remains inside a home and when that home can be considered safe to occupy.
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