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AB-1642 • 2026

Wildfires: contamination standards.

Wildfires: contamination standards.

Education Taxes
Active

The official status still shows this bill as active or still awaiting another formal step.

Sponsor
Harabedian
Last action
Official status
Senate - Appropriations
Effective date
Not listed

Plain English Breakdown

The official text uses 'reduce' for cancer cases but the candidate explanation used 'prevent'; this was corrected in the summary and details.

Wildfire Contamination Standards

This law creates a rule that buildings are not considered safe after a wildfire unless indoor surfaces meet specific conditions for lead and asbestos, while requiring new regulations to be written by future dates.

What This Bill Does

  • Establishes a nonrebuttable presumption that homes, schools, workplaces, or other structures are only safe for people if the levels of lead and TEM-identified asbestos on indoor surfaces meet specified conditions after a wildfire.
  • Requires the Department of Toxic Substances Control to adopt emergency regulations by July 1, 2027, setting science-informed standards for testing and clearing lead and asbestos inside and outside structures in residential areas after wildfires.
  • Requires the department to work with the Office of Environmental Health Hazard Assessment to adopt regulations by July 1, 2028, setting health-based standards for other hazardous chemicals following a wildfire.
  • Mandates that chemical levels be set to ensure safe reoccupancy and reduce cancer cases and noncancer health risks caused by wildfires.
  • Defines the term 'downward ash zone' and requires the department to determine this downwind area for each WUI fire using data from the National Oceanic and Atmospheric Administration.

Who It Names or Affects

  • Owners or occupants of homes, schools, workplaces, and other structures in areas affected by wildfires.
  • The Department of Toxic Substances Control, which must write new regulations.
  • The Office of Environmental Health Hazard Assessment, which helps set chemical safety standards.

Terms To Know

Nonrebuttable presumption
A rule that cannot be argued against; if the test results do not meet the standard for lead or asbestos on indoor surfaces, the building is automatically considered unsafe.
TEM-identified asbestos
Asbestos fibers found using a specific type of microscope called Transmission Electron Microscopy.
Downward ash zone
The area downwind from a fire where officials must determine the extent of ash fall for each WUI fire.

Limits and Unknowns

  • The specific numbers or conditions for safe levels of lead, asbestos, and other chemicals are not in this text; they will be set by future regulations.
  • This law does not state when it officially takes effect because the effective date is listed as blank.

Bill History

  1. California Legislative Information

    Senate - Appropriations

Official Summary Text

Wildfires: contamination standards.