Air Quality in Aurora, Illinois — Live
Live readings from PurpleAir sensors across Aurora — with free alerts when summer ozone or wildfire smoke pushes the air into unhealthy territory.
Live Aurora AQI from nearby PurpleAir sensors loads when this page opens in a browser, along with a live sensor map covering Aurora and North Aurora, Montgomery, Oswego, Naperville.
Aurora's air is unremarkable most of the year — this stretch of the Fox River Valley doesn't sit in a smoke corridor or an industrial basin the way some cities do. The real pattern here is summer ozone: Aurora sits inside the Chicago metro area that the EPA reclassified to "Serious" nonattainment for ozone in January 2025, which means hot, sunny, high-traffic days between May and September are the days worth watching, not winter.
On top of that, Aurora has twice in recent years watched Canadian wildfire smoke drift down from the north and blanket the whole region for days at a time. 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.
Aurora is part of Chicago's "Serious" ozone nonattainment area
In December 2024 the EPA finalized a rule finding that the Chicago-Naperville area — Cook, DuPage, Kane, Lake, McHenry, and Will counties, plus parts of Grundy and Kendall — had failed to meet the 2015 ozone health standard by its deadline. The reclassification from Moderate to Serious nonattainment took effect January 16, 2025, and Kane County, where Aurora is the county seat, sits squarely inside that boundary.
Ozone isn't smoke — it forms when tailpipe and industrial emissions cook in sunlight and heat, which is why the worst days in Aurora tend to be still, sunny, 85-plus-degree afternoons in June, July, and August rather than any particular wind direction. The Illinois EPA calls these Air Pollution Action Days, and the whole Chicago metro area, Aurora included, gets flagged together whenever the forecast crosses into Unhealthy for Sensitive Groups territory.
Canadian wildfire smoke has reached Aurora too
Aurora doesn't have its own fire season, but it isn't immune to other regions' fires either. On June 27, 2023, Chicago briefly had the worst air quality of any major city in the world as smoke from wildfires in Quebec settled over the region, and the Illinois EPA's alert that day named Kane County specifically alongside Cook, DuPage, and Will.
It happened again in August 2025, when a statewide Air Pollution Action Day driven by Canadian wildfire smoke and ozone stretched for nearly a week across Cook, DuPage, and the surrounding counties. Neither event had anything to do with a local fire — the smoke traveled hundreds of miles — which is exactly why a single citywide number from a distant monitor isn't enough; the sensor nearest your house is what actually tells you what you're breathing.
What to actually do on an ozone or smoke day in Aurora
Ozone peaks in the afternoon and early evening, so if you're planning a run along the Fox River Trail or an afternoon at RiverEdge Park, checking the number before you go — not after your eyes start to sting — is what actually helps. Moving a workout to the morning, before ozone has had time to build up in the heat, is one of the simplest fixes on a flagged day.
Canairy exists for exactly this: set a threshold once for your house, your kid's school, or your parents' place across town, and we'll tell you the moment the air crosses it — whether that's a summer ozone spike over the Fox River Valley or smoke drifting down from a fire a thousand miles away.
Aurora air quality FAQ
What is the air quality in Aurora right now?
This page shows the current AQI for Aurora, calculated from PurpleAir sensors across the city and updated continuously. The map below shows every live sensor, so you can check the reading closest to your own neighborhood, from the Fox River Valley to the far east side.
Why does Aurora get ozone alerts in the summer?
Aurora sits inside the Chicago-Naperville area, which the EPA reclassified to "Serious" nonattainment for ozone in January 2025 after the region missed its 2015 ozone standard deadline. Ground-level ozone forms when vehicle and industrial emissions react with sunlight and heat, so hot, sunny, high-traffic days from May through September are when Aurora's air is most likely to cross into Unhealthy for Sensitive Groups territory.
Does Canadian wildfire smoke reach Aurora?
Yes. On June 27, 2023, Chicago and its suburbs — including Kane County, where Aurora sits — had some of the worst air quality of any major metro area in the world because of smoke from wildfires in Quebec, and a similar statewide Air Pollution Action Day driven by Canadian wildfire smoke hit the region again in August 2025. Neither fire was anywhere near Illinois; the smoke traveled hundreds of miles on upper-level winds.
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.
Where does Canairy's Aurora data come from?
Readings come from PurpleAir's network of laser particle sensors across Aurora and surrounding towns, cross-referenced with government monitors and the Google Air Quality API. You can see every sensor behind your numbers on the live map - there's no black box.
Get Canairy free on Google Play.