OEHHA Notice of Proposed Rulemaking to amend 27 CCR §25705(b) to add proposed NSRLs for 1-bromopropane and diethanolamine (dermal)

OEHHA issued a Notice of Proposed Rulemaking to amend Title 27 of the California Code of Regulations, section 25705(b), to add new No Significant Risk Levels (NSRLs) used as Proposition 65 cancer “safe harbor” exposure levels. The proposal would add an NSRL of 54 µg/day for 1-bromopropane and an NSRL of 6.4 µg/day for diethanolamine for dermal exposure only (explicitly not applicable to other exposure routes). OEHHA’s notice sets a public comment deadline of October 6, 2025, and provides that a public hearing will be held only if requested by September 22, 2025. Compliance teams may wish to submit comments and, if adopted, consider how these NSRLs affect internal Prop 65 exposure assessments and warning determinations.