County of Marin - News Releases - Air Quality

For Immediate Release
August 30, 2023

Wildfire Smoke Prompts Local Health Advisory

Northern California Wildfires Worsen Marin's Air

Marin County, CA – The Bay Area Air Quality Management District has issued an air quality advisory for wildfire smoke through Thursday, August 31. Smoke levels in the Bay Area are expected to reach the high-moderate tier on the EPA’s Air Quality Index (AQI). Smoky, hazy skies are visible, and the smell of smoke is possible. National Weather Service forecasts onshore winds starting tonight that may bring relief.

Marin Public Health officials urge community members to take precautions by limiting outdoor activity due to the poor air quality caused by wildfire events throughout Northern California.

Those most at risk include those with chronic lung conditions such as emphysema and asthma.

Take these steps to avoid or reduce smoke exposure:

  1. Stay Informed: Follow HHS Wildfire Air Quality recommendations along with AirNow’s Air Quality Index. When the AQI is 150 or greater, it’s time to take special precautions. 
  2. Limit Outdoor Activities: Stay indoors when possible to minimize your exposure to heavy smoke.
  3. Create a Clean Environment
  • Close windows and doors.
  • Use a CARB-certified air cleaner.
  • Run home and car air conditioning on recirculate mode.
  • Avoid vacuuming, frying food, or using gas-powered appliances.
  1. Use a Mask: If outdoor activity is unavoidable when air quality is poor, N95 masks are recommended. Cloth or paper masks are not effective against wildfire smoke.
  2. Sign up for Alerts: Enhance your awareness by signing up with Nixle, ReadyMarin, and PG&E Monitor the Marin County Public Emergency Portal for updated information.


Dr. Matthew Willis
Public Health Officer
Health and Human Services

3240 Kerner Blvd.
San Rafael, CA 94901
(415) 473-4163
Email: Dr. Matthew Willis
Marin HHS website