Air Quality in Anaheim, California — Live
Live readings from PurpleAir sensors across Anaheim — with free alerts the moment the air turns.
AQI 39 from 5 PurpleAir sensors · Trending up · data from PurpleAir
As of , the air quality in Anaheim, California is AQI 39 — Good and rising — with PM2.5 at 7.0 µg/m³, the median of 5 live PurpleAir sensors reading 29 to 49. Canairy's verdict: Breathe easy.
For scale, that PM2.5 reading is below the World Health Organization's 24-hour guideline of 15 µg/m³. The WHO figure is a daily average and this is a live reading, so read it as a sense of magnitude rather than a formal exceedance — a brief spike and a bad day are not the same thing. More on the WHO guidelines
Pollen today in Anaheim: weeds pollen is the strongest of the three at a low level, from Google's pollen forecast. Canairy shows the tree, grass and weed forecast beside the air reading on every plan, including the free one.
Free to download · Live data from PurpleAir & public monitors
Live PurpleAir sensor map for Anaheim and Fullerton, Orange, Garden Grove, Yorba Linda. Every dot is a real sensor, color-coded by current air quality.
Sensor by sensor in Anaheim
The sensors Canairy reads in Anaheim agree right now — all 5 sit in the Good band, a 20-point spread — so the city-wide number is a fair description of the whole area today.
| From city center | AQI | Category |
|---|---|---|
| 0.5 mi SE | 29 | Good |
| 5.1 mi NNE | 49 | Good |
| 5.5 mi NNE | 43 | Good |
| 6.1 mi NW | 39 | Good |
| 6.8 mi SE | 32 | Good |
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.
What Canairy does for Anaheim
A clear verdict
Not just a number — a plain-English call for Anaheim: open the windows, or keep them shut.
Smoke alerts
A push or text the moment the air crosses your threshold — and again when it clears.
A heads-up before it's bad
Trend alerts catch the air turning, so you can close up the house before the smoke settles in.
Every place you care about
Home, work, the kids' school — across Anaheim or across the country, on one screen.
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
What is the air quality in Anaheim right now?
As of September 10, 2026 at 5:10 AM PDT, the air quality in Anaheim, California is AQI 39 — Good — with PM2.5 at 7.0 µg/m³, the median of 5 live PurpleAir sensors. Open the windows. Great for outdoor activity.
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.
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 the AQI numbers mean
| AQI | Category | What it means for you |
|---|---|---|
| 0–50 | Good | Open the windows. Great for outdoor activity. |
| 51–100 | Moderate | Sensitive groups may want to take it slower outside. |
| 101–150 | Unhealthy for Sensitive Groups | Kids, elderly, and respiratory conditions stay closer to home. |
| 151–200 | Unhealthy | Skip outdoor exercise. Close windows. |
| 201–300 | Very Unhealthy | Limit time outside. N95 if you must go. |
| 301+ | Hazardous | Health emergency. Stay inside, run filtration if you have it. |
Canairy lets you tighten these bands if you’re more sensitive than the EPA default, so an alert can fire before the official category changes. How to read the Air Quality Index
Where these readings come from
The AQI at the top of this page is the median of the 5 curated PurpleAir sensors Canairy tracks in and around Anaheim, with outliers set aside so that one sensor brought indoors — or parked beside a barbecue — cannot set the number for a whole city. Every sensor behind it is listed above with its distance and bearing from the city center. There is no black box here.
In the app, a place you save resolves the same way first. When no neighborhood sensor is reporting it falls back to the nearest EPA AirNow monitor, and anything modeled rather than measured is labelled a regional estimate rather than passed off as a sensor reading. How low-cost sensors compare to regulatory monitors
About Canairy
Canairy is free to download. The free plan covers one saved place with live readings, a plain-English verdict, and push alerts when the air crosses a threshold you choose. Paid plans add more places, faster refreshes, and SMS alerts. It is built by two parents in Sonoma County, California, who got tired of guessing whether it was safe to send the kids outside. Why we built it
Go deeper
Air quality near Anaheim
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