Air Quality in Fishers, Indiana — Live

Live readings from PurpleAir sensors across Fishers — with free alerts when summer ozone or smoke moves in.

Live Fishers AQI from nearby PurpleAir sensors loads when this page opens in a browser, along with a live sensor map covering Fishers and Carmel, Noblesville, McCordsville, Fortville.

Fishers sits in the Indianapolis suburbs, in Hamilton County just northeast of the city, and its air follows the same rhythm as the rest of central Indiana: clean and unremarkable through most of the year, then noticeably worse on hot, still summer afternoons when ground-level ozone builds up across the metro. Hamilton County spent years under a federal ozone nonattainment designation before being redesignated to maintenance status in 2007, and the same ingredients that earned that label — summer heat, strong sun, and heavy vehicle traffic on corridors like I-69 — still produce the occasional ozone action day each summer.

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.

Summer ozone, not wildfire smoke, is the everyday story here

Ground-level ozone forms when vehicle exhaust and other emissions react in strong sunlight and heat, and central Indiana's ozone season runs roughly May through September, peaking on hot afternoons. Vehicular emissions account for an estimated 60 to 70 percent of the region's nitrogen oxide pollution — the main ozone ingredient — and Fishers sits directly on that supply line: Interstate 69 runs through the city with four full interchanges, and State Road 37 cuts through as well, carrying tens of thousands of commuters in and out of Indianapolis every day.

Hamilton County was designated nonattainment for the federal 8-hour ozone standard before EPA redesignated it to maintenance status on October 19, 2007 — meaning the county now meets the standard but is still tracked to make sure it stays that way. On days when heat, stagnant air, and traffic emissions combine, the Central Indiana Knozone program calls an Action Day and asks residents to refuel after 7 p.m., put off mowing, skip vehicle idling, and combine errands until the air clears.

Canadian wildfire smoke reached Fishers too, in June 2023

Fishers doesn't sit near forests the way a lot of the western pages on this site do, but it isn't immune to wildfire smoke either. In late June 2023, smoke from that year's historic Canadian wildfire season drifted south into the Great Lakes and Ohio Valley, and central Indiana — including the Indianapolis metro — spent several days under hazy skies and air quality alerts as the plume moved through.

That event is the reminder for a place like Fishers: smoke from fires hundreds of miles away doesn't care about local geography, and it can arrive on almost any wind pattern, any time of year, regardless of whether the local forecast otherwise calls for a clear day. A city with no fire risk of its own can still get an unhealthy air day out of nowhere, which is exactly the kind of change a sensor catches and a glance out the window doesn't.

Fishers grew fast, and the traffic grew right along with it

Fishers was a farm town of a few thousand people as recently as the 1980s. By the 2020 census it had 98,977 residents, up 28.9 percent in a single decade — one of the fastest growth rates of any city in Indiana. That growth shows up on the roads: I-69 through Fishers now carries far more daily traffic than it did even ten years ago, and the corridor is one of the busiest commuter routes into downtown Indianapolis, about 16 miles to the southwest.

More cars mean more of the nitrogen oxide emissions that cook into ozone on a hot afternoon, so Fishers' own growth is part of the regional ozone math, not just something that happens "in the city." In practice, that means sensor readings near I-69 and State Road 37 can run a notch higher than the quieter, more residential parts of Fishers on a bad-air day — one more reason to check the reading nearest wherever you actually are, rather than a single number for the whole city.

Fishers air quality FAQ

What is the air quality in Fishers right now?

This page shows the current AQI for Fishers, 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.

Why does Fishers get hazy or smoggy in summer?

Central Indiana's ozone season runs roughly May through September, and ground-level ozone forms when vehicle exhaust and other emissions react in strong sun and heat. Fishers sits on two heavily traveled corridors, I-69 and State Road 37, and Hamilton County was once a federal ozone nonattainment area before being redesignated to maintenance status in 2007. On the hottest, stillest days, the Knozone program calls an Action Day for the whole Indianapolis region.

Did Canadian wildfire smoke really reach Fishers?

Yes. In late June 2023, smoke from that year's historic Canadian wildfires drifted into the Great Lakes and Ohio Valley, and central Indiana — including the Indianapolis metro that Fishers sits in — saw hazy skies and air quality alerts for several days. It's a reminder that smoke from fires hundreds of miles away can affect a place with no local wildfire risk at all.

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.

Where does Canairy's Fishers data come from?

Readings come from PurpleAir's network of laser particle sensors across Fishers and surrounding Hamilton County 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.

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.