Air Quality in Anaheim, California — Live

Live readings from PurpleAir sensors across Anaheim — with free alerts the moment the air turns.

Live Anaheim AQI from nearby PurpleAir sensors loads when this page opens in a browser, along with a live sensor map covering Anaheim and Fullerton, Orange, Garden Grove, Yorba Linda.

Anaheim sits at the mouth of the Santa Ana Canyon, and that is most of the story. The canyon is a water gap between the Santa Ana Mountains and the Chino Hills where the river and the 91 freeway both squeeze through — and where the Santa Ana winds blow hardest, which is how they got the name. It is also why fire keeps arriving from the same direction. The Canyon Fire 2 started near the 91 and Gypsum Canyon Road on the morning of October 9, 2017, ran into Anaheim Hills on gusts to 45 mph, and destroyed 25 homes on streets like Canyon Heights Drive before it was done. Down on the flatland west of the hills, the air problem is a different one entirely: ordinary Orange County traffic and summer ozone.

Canairy watches the sensors around your home, your kids' school, and everywhere else you care about, and tells you in plain English when the air changes enough to matter.

The Santa Ana winds are named after the canyon, not the city

This one gets misremembered constantly. The winds take their name from the Santa Ana Canyon along Anaheim's eastern edge, which receives particularly strong Santa Ana winds compared with the surrounding area. The earliest known printed use of the term is in the Anaheim Gazette of September 23, 1871.

The popular alternative — that the real name is santana, a Spanish or Native word for devil wind, corrupted over time — does not hold up. Research compiled by a UCLA atmospheric scientist found that the Los Angeles Times almost never printed santana before 1956, and that a recognised authority on Native languages said no such word ever existed. What is true is that the winds are offshore, hot, dry and downslope, and that they are the reason October and November are the dangerous months here.

Fire comes down the canyon, and so does the smoke

Anaheim has a genuine local fire record, not a borrowed one. The Canyon Fire 2 burned 9,217 acres starting October 9, 2017, ignited by embers from an earlier fire and driven by sustained 30 mph winds gusting to 45. It destroyed 25 homes and damaged 55 more, with fire reported on Canyon Heights Drive, Tamarisk Drive, and at Serrano Avenue and Hidden Canyon Road, and evacuations reaching into Orange and Tustin.

Then 2020 brought two more. The Blue Ridge Fire burned in Yorba Linda and Chino Hills State Park, immediately northeast of Anaheim Hills, reaching 14,334 acres by late October, with North Orange County named among the areas of potential direct smoke impact. That December the Bond Fire in Santiago Canyon prompted an advisory naming Anaheim specifically as a place smoke would be pushed.

The nightly fireworks question

Residents near Disneyland complained for years about smoke from the nightly shows. In the late 1990s the resort went to Los Alamos National Laboratory for help, and in June 2004 it debuted a compressed-air launch system that lifts shells without black powder — cutting ground-level smoke and noise and reducing metal content by about 90 percent. Disney donated the seven associated patents so other pyrotechnic companies could license them.

Fireworks still produce particulate when the shells burst; the change was to the launch, not the explosion. If you live close enough to notice, the sensor nearest you will show it better than any citywide figure.

Anaheim air quality FAQ

Why is there smoke in Anaheim today?

Most often it is a fire in the canyons east or northeast of town, pushed toward the city by wind. That has a track record: the Canyon Fire 2 in October 2017, the Blue Ridge Fire in Yorba Linda and Chino Hills State Park in October 2020, and the Bond Fire in Santiago Canyon that December, where the air district explicitly forecast smoke moving into northern Orange County. Anaheim can also catch smoke drifting down from Los Angeles County, though during the January 2025 fires much of Orange County stayed in the Good to Moderate range.

What is the air quality in Anaheim right now?

This page shows the current AQI for Anaheim, calculated from PurpleAir sensors across the city and updated continuously. Anaheim is large enough that the answer depends on where in it you are — Anaheim Hills and the flatland near the 5 and the 57 can read differently on the same day. The map below shows every live sensor.

Do Santa Ana winds make the air better or worse?

Both, depending on whether anything is burning. A 2020 study in the journal GeoHealth looked at 1,083 Santa Ana wind days across 578 Southern California zip codes and found the winds normally lower PM2.5 by pushing pollution offshore. When a fire is burning upwind, the same winds carry smoke straight into populated areas instead.

Is Anaheim Hills more at risk than the rest of Anaheim?

For fire and fire smoke, yes — it is the part of the city up against the canyon and the wildland, and it is where homes actually burned in 2017. For everyday traffic pollution and ozone, the flatland closer to the freeways is the more exposed side. They are different problems in the same city, which is why it is worth watching a sensor near your own address.

What AQI level is unhealthy?

Under the US EPA scale, AQI 0–50 is Good and 51–100 is Moderate. From 101 the air is Unhealthy for Sensitive Groups — kids, older adults, and people with asthma or heart conditions — and above 150 it's Unhealthy for everyone. Canairy translates these numbers into a plain-English verdict, like whether to close the windows or move a workout indoors.

Is Canairy free?

Yes. The Canairy app is free to download and includes live air quality for all your saved places, plain-English verdicts, and free push alerts when the air crosses your threshold. A paid plan adds extras like SMS text alerts.

Get Canairy free on Google Play.