An interactive tool for the frontline communities of the San Francisco Bay Area to explore our air quality.
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Report pollution incidents through our app right when you experience them


Where do the data come from?

Most of the data on our site come from Unlike, however, our site displays archived data from as far back as May 2015. The rest come from BAAQMD monitors or inexpensive monitors set up by community members.

Who decides what level of a given chemical constitutes a health hazard?

Health limits vary widely between governmental agencies. Our site uses figures from the US National Ambient Air Quality Standards (NAAQS), the Agency for Toxic Substances and Diseases Registry (ATSDR), and the California Office of Environmental Health Hazard Assessment (OEHHA). In the interest of public health, we chose the lowest figures that were deemed hazardous for each chemical.

An air pollution event occurred in my community, but the monitors didn’t pick up anything. What happened?

Events that occur outside the range of the sensors may not appear on the site. What the monitors pick up depends highly on the location of the pollution source, and the wind speed and direction at the time of the event.

Why are schools and daycares included on the map?

Air pollution carries higher risks for vulnerable populations—which includes children and the elderly. Because our aim is to contextualize air pollution data in how it impacts real people, we wanted residents to be able to see whether an air pollution event might impact their children.


Report a Pollution Incident
(i.e. flaring, odor, residue, health symptoms)

When you report to Air Watch Bay Area, you contribute to a publicly visible "paper trail" of incidents.
Having this paper trail enables community members to hold Bay Area Air Quality Management District accountable.

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If you cannot resolve this error, please take screenshots of your entire report and email airwatchbayarea[at] and we will get back to you shortly!

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Click here to make a report to the BAAQMD site.

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This is not a substitute for reporting to BAAQMD, since we cannot relay your report directly to them. We recommend that you also submit a report through their website.

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