Good air right now.

Fine particles are driving this official reading.

Updated Sun, Aug 30, 10:00 AM · San Francisco Bay Area, CA

45US AQI · Good

What’s shaping the air

Fine particles are leading.

This pollutant is contributing the most to the current AQI.

What comes next

Official

Now · 10 AM45GoodUS AQIfine particles

Good through Mon.

See every reading

Plan around it

Pick an activity and we’ll check the conditions.

What do you want to do?

Fine-tune this plan Optional

How long will you be outside?1 hr

How far ahead should we look?The next 3 days

What times work for you?6:00 AM–9:00 PM

Earliest start

Finished by

The full activity must fit between these times.

What should we be extra careful about? Optional

Air quality or smokeSun or UVHeatCold

How we knowSources, updates, and important limits

Official monitoring is preferred when it is current and close enough. Modeled estimates stay clearly labeled.

Sources used here: AirNow · participating air agencies · preliminary real-time US AQI
Reporting area: San Rafael · About 33 miles from the evaluation point.

San Francisco Bay Area has recurring outdoor-condition questions worth checking with current official and modeled data plus durable local context.