Document Search

Effective December 8, 2025, the Office of Environmental Health Hazard Assessment has added the developmental toxicity endpoint to the reproductive toxicity listing of bisphenol S (BPS) under Proposition 65. This addition was done via the “State’s Qualified Experts” listing mechanism, based on the Developmental and Reproductive Toxicant Identification Committee’s determination that this chemical was clearly shown to cause developmental toxicity.

Effective December 8, 2025, the Office of Environmental Health Hazard Assessment added N-methyl-N-formylhydrazine to the Proposition 65 list as a carcinogen. This listing was done via the “State’s Qualified Experts” mechanism, based on the Carcinogen Identification Committee’s determination that this chemical was clearly shown to cause cancer.

Fish advisory for Hodges Reservoir in San Diego County.

OEHHA is extending the public comment period by 15 days on the draft technical support document for the proposed Public Health Goal (PHG) for 1,4-dioxane in drinking water. The comment period will now close on November 25, 2025.

The development of a public health goals (PHG) for Perfluorohexane Sulfonic Acid and update of the PHG for arsenic are both being initiated at the request of State Water Resources Control Board. The PHG development/update will incorporate relevant new data. Office of Environmental Health Hazard Assessment is requesting information on these contaminants that could assist in conducting the risk assessments and in calculating the PHGs.

The Office of Environmental Health Hazard Assessment has adopted No Significant Risk Levels for titanium dioxide (airborne, unbound particles of respirable size)of 440 micrograms per day for airborne, unbound titanium dioxide particles with diameters of 10 micrometers or less, and 44 micrograms per day for airborne, unbound titanium dioxide particles with diameters of 0.8 micrometers or less.

OEHHA will convene a meeting of the Developmental and Reproductive Toxicant Identification Committee (DARTIC). At this meeting the DARTIC will consider the possible listing of bisphenol S (BPS) based on developmental toxicity. OEHHA is also opening a 45-day public comment period on the hazard identification document entitled “Evidence on the Developmental Toxicity of Bisphenol S."

OEHHA proposes to adopt Proposition 65 No Significant Risk Levels (NSRLs) for 1-bromopropane and diethanolamine by amending Title 27, California Code of Regulations, section 25705(b)(1).

Fish advisory for Soulajule Reservoir.

Harmful algal blooms (HABs) also occur in the ocean, and can cause illnesses in humans and animals. This page provides an overview of potential marine HAB illnesses, precautions to reduce exposure, and how to report any potential illnesses that may occur.