Guidance UpdateLiveGuidance UpdateLive Regulation
Titanium Dioxide NSRL Adopted for Airborne Particles
California Code of Regulations, Title 27, Section 25705Office 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). The NSRL provides a safe harbor level allowing businesses to determine if Prop 65 cancer warning requirements apply for exposures below the NSRL threshold. Effective October 1, 2025.
Sources
Key Findings
Titanium Dioxide NSRL Adopted for Airborne Particles
[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-airborne-unbound-particles-respirable#main-content) [CA.gov CA.gov](https://ca.gov/) Official website of the State of Cali