Bayview Opera House

San Francisco, CA

Tuesday, September 26, 2023 at 10:06 AM

The current air quality at this monitor is


Health recommendations: It’s a good time to be active outside

Current Community Air-Quality Level (CAL) reading for this monitor (updated every 5 min)

CAL 18
PM2.5* 4
PM10* <1

*estimated particulate matter concentration (µg/m³)

NA: not available

Air quality summary for the past 24 hours


Average 9
Highest 18
Lowest 5


Average 2
Highest 4
Lowest 1


Average <1
Highest <1
Lowest <1

*estimated particulate matter concentration (µg/m³)

NA: not available

Air quality summary for the past 30 days


30-day average 42
Highest 30-day average 109
Lowest 30-day average 10


30-day average 12
Highest 30-day average 39
Lowest 30-day average 3


30-day average 14
Highest 30-day average 105
Lowest 30-day average <1

*estimated particulate matter concentration (µg/m³)

NA: not available

Air quality summary for the past 90 days


90-day average 31
Highest 90-day average 109
Lowest 90-day average 6


90-day average 8
Highest 90-day average 39
Lowest 90-day average 2


90-day average 11
Highest 90-day average 105
Lowest 90-day average <1

*estimated particulate matter concentration (µg/m³)

NA: not available

About CALs

Community Air-Quality Levels (CALs) are used to describe air quality in terms of how harmful the level of particulate matter (PM) pollution in the air is to human health. The CALs are derived using similar methods as EPA’s Air Quality Index (AQI).

You should use both IVAN Air Monitoring and government air data to understand the air quality levels around you. When comparing health recommendations from both sources, you should follow the most health protective recommendation.

*Sensitive groups include children, teens, older adults, pregnant women, and people with heart, lung, or other chronic diseases


When using this information, please note the following:

  • In order to provide air quality information in real time, the data presented on this website are not validated or verified
  • The air quality levels are for particulate matter (PM) only. Other air pollutants, such as ozone, may be present, even when PM levels are low.
  • These data do not come from regulatory monitors and cannot be used to infer violations of the law
  • Data on this website should be considered preliminary and used with discretion

Learn more about our monitor validation process, how to use the data on this website, and how to compare the data with government

More info

View the Air Monitoring Q&A for more information on the following topics:

Government air data

Air quality data for the Bay Area is currently reported by government regulatory air monitors which can be found at

Data reported by IVAN Air Monitoring and by government monitors should both be used to better understand air quality levels near you. There are differences in how these data are collected, such as the locations monitored, the equipment used, and pollutants measured. Therefore, differences in reported air data are expected. When considering how to best protect your health, we recommended you consider multiple sources of air quality data and follow the most health protective recommendations.

Visit the Air Monitoring FAQs for more information about how our data compares with government data.

Report an air problem

If you are experiencing an emergency, call 9-1-1.

Step 1. Report to Bay Area Air Quality Management District (BAAQMD).

Call 1-800-334-ODOR (6367) as son as you notice a problem with air quality. Their website also offers an opportunity to submit an online complaint and lists additional complaints that are outside of their jurisdiction they may not be able to respond to.

Step 2. Report on IVAN.

After contacting BAAQMD, we recommend that you also submit a record of the problem here on BVHP- IVAN, including a note that BAAQMD has been contacted. This ensures that the Environmental Justice Task Force is aware of the complaint and that the complaint is documented on the BVHP-IVAN website.


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