Air is unhealthy for sensitive groups.

Fine particles are driving this modeled reading.

Updated Sun, Aug 30, 9:35 AM · Orange County, CA

110US AQI · Unhealthy for sensitive groups

What’s shaping the air

Fine particles are leading.

This pollutant contributes the largest share of the modeled AQI right now.

What comes next

Modeled hourly outlook

Modeled

Now · 10 AM110Unhealthy for sensitive groupsUS AQIfine particles

Unhealthy for sensitive groups now, easing to Moderate by 1 PM.

See every reading

Complete city forecast

See the full Orange County forecast

Current weather · next 24 hours · five days · radar

Plan around it

Find your best time in Orange County.

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

Different instruments. One honest answer.

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

Sources used here: Open-Meteo · Copernicus Atmosphere Monitoring Service global modeled air quality
Model grid: CAMS global model grid · A regional atmospheric model—not a neighborhood monitor.

Why this is modeled

AirNow remains the preferred source. This modeled fallback prevents a monitoring-coverage gap from being mistaken for clean air or from leaving the entire city briefing empty.

Read the full source methodology Understand this signal