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The California Environmental Protection Agency’s Office of Environmental Health Hazard Assessment (OEHHA) intends to list atrazine as known to the state to cause cancer under the Safe Drinking Water and Toxic Enforcement Act of 1986, sections 25249.5 et seq. of the Health and Safety Code (HSC), otherwise known as Proposition 65.
| Program: Proposition 65

Fishery closure and re-opening recommendations due to biotoxin levels

| Program: Fish
The Office of Environmental Health Hazard Assessment (OEHHA) will host an online pre-regulatory workshop to discuss a potential set of amendments related to vinyl acetate to existing Proposition 65 regulations on September 30, 2026.
| Program: Proposition 65
The Office of Environmental Health Hazard Assessment (OEHHA) is announcing a second draft document describing the proposed updated Public Health Goal (PHG) for N-nitrosodimethylamine (NDMA) in drinking water.
| Program: Water
OEHHA is referring ethoprop to the Carcinogen Identification Committee for a recommendation concerning whether the chemical should continue to be included on the list of chemicals known to the state to cause cancer.
| Program: Proposition 65

2020 Recommendations to the California Public Utilities Commission Regarding Health Protective Standards for the Injection of Biomethane into the Common Carrier Pipeline.

| Program: Air
Learn symptoms of a HAB-related illness, where HAB-related illnesses have been reported, and how to report a potentially HAB-related illness.
| Program: Fish
Aprenda los síntomas de una enfermedad asociada con la proliferación de algas nocivas, dónde se han informado posibles enfermedades asociadas con la proliferación de algas nocivas y cómo informar una enfermedad potencialmente asociada con la proliferación de algas nocivas.
| Program: Fish
Fish advisory for Twin Lakes in Mono County.
| Program: Fish

Las proliferaciones de algas nocivas marinas (HAB, por sus siglas en inglés) también ocurren en el océano y pueden causar enfermedades en seres humanos y animales.  Esta página proporciona una descripción general de las posibles enfermedades asociadas con la proliferación de algas nocivas marinas, las precauciones para reducir la exposición y cómo informar cualquier enfermedad potencial que pueda ocurrir.

| Program: Fish