Regulation ChangeLiveLive RegulationGuidance Update
OEHHA adopts NSRL for airborne titanium dioxide particles
California Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1986)Office of Environmental Health Hazard Assessment (OEHHA)California
Announced
Jun 18, 2025
Effective
Oct 1, 2025
Implementation
Oct 1, 2025
Description
OEHHA adopted a No Significant Risk Level (NSRL) for Titanium Dioxide (airborne, unbound particles of respirable size) under Proposition 65. The NSRL establishes a safe harbor level for cancer risk from inhalation exposure, allowing businesses to determine if exposures require Proposition 65 warnings. The regulation was approved by the Office of Administrative Law on June 18, 2025 and took effect on October 1, 2025.
Sources
Key Findings
OEHHA adopts NSRL for airborne titanium dioxide particles
# Proposition 65: No Significant Risk Levels for Titanium Dioxide (airborne, unbound particles of respirable size) - OEHHA [Skip to main content](https://oehha.ca.gov/proposition-65/crnr/proposition-65-no-significant-risk-levels-titanium-dioxide-airborne-unbound-particles-respirable#main-content) [Skip to Main Content](https://oehha.ca.gov/proposition-65/crnr/proposition-65-no-significant-risk-levels-titanium-dioxide