Air Quality in Fort Smith, Arkansas — Live

Live readings from PurpleAir sensors across Fort Smith — with free alerts the moment summer ozone or drifting smoke pushes the air past your threshold.

Live Fort Smith AQI from nearby PurpleAir sensors loads when this page opens in a browser, along with a live sensor map covering Fort Smith and Van Buren, Barling, Greenwood, Alma.

Fort Smith's air is good most of the year, and by several measures it's one of the better records in Arkansas — a river-valley setting with steady wind and a lighter industrial footprint than the state's bigger metros helps keep it that way. The exception is summer: weeks of 90-plus-degree heat plus the usual Arkansas River Valley humidity are exactly the ingredients that turn sunlight and vehicle exhaust into ground-level ozone, and the same valley that usually clears out can hold that ozone in place when a high-pressure system sits overhead for days.

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.

Fort Smith sits in a valley, not a smog basin

The city sits at the confluence of the Arkansas and Poteau Rivers, at an elevation of about 463 feet, in the Arkansas River Valley between the Ozark Mountains to the north and the Ouachitas to the south. It's a real valley, but a wide, working one rather than the tight, wind-blocked basin that traps pollution in places like the Los Angeles or Napa valleys — Fort Smith gets enough steady wind moving through the corridor most days to carry pollutants out rather than letting them build up.

That geography, combined with wide streets and comparatively low traffic congestion for a metro its size, is a big part of why one recent comparison of Arkansas cities ranked Fort Smith's typical air quality second-best in the state, behind only Bella Vista and ahead of Little Rock and the booming Bentonville-Rogers corridor. It's not pristine mountain air, but it's a genuinely decent baseline most of the year.

Summer heat is what actually moves the needle

Fort Smith's climate runs hot: an average of roughly 78 days a year top 90°F, and about 11 days a year cross 100°F, with a long, humid Southern summer stretching from June into September. That combination of intense sun and heat is the classic recipe for ground-level ozone, which forms when vehicle and industrial exhaust cooks in strong sunlight rather than being emitted directly. It's a summertime problem here, not a wintertime one.

The Arkansas Department of Environmental Quality maintains an ambient air monitor for the Fort Smith metro area specifically to track this, and the same valley setting that clears the air on a windy day works against it on a stagnant one — when a high-pressure system parks over the region for a stretch of still, hot days, that's when ozone readings climb closest to the level that matters for people with asthma or heart conditions.

A trucking and manufacturing town, not a refinery town

Fort Smith is a logistics and manufacturing hub more than an industrial one. ArcBest — the parent of ABF Freight, one of the country's largest less-than-truckload carriers — was founded here in 1966 and still runs its headquarters campus on the east side of the city, with I-40 and I-540 carrying a steady stream of freight traffic through the metro. OK Foods, a major poultry processor, is also headquartered in Fort Smith, and the city's manufacturing base includes Rheem, Trane, Georgia-Pacific, Mars Petcare, and International Paper.

None of that adds up to the kind of refinery or heavy-industry pollution that dominates the story in some other cities, but it is a real, local source of everyday NOx and fine particles from truck traffic and manufacturing that a purely rural stretch of the Arkansas River Valley wouldn't have. And Fort Smith isn't entirely walled off from wildfire smoke either — in late July 2026, smoke from Canadian wildfires drifted far enough south to prompt air-quality advisories across parts of Arkansas, a reminder that even a city with no fire season of its own can still get a smoky day when the wind lines up right.

Fort Smith air quality FAQ

What is the air quality in Fort Smith right now?

This page shows the current AQI for Fort Smith, 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 Fort Smith's air quality get worse in summer?

Fort Smith averages around 78 days a year above 90°F, and that heat combined with strong sunlight is what drives ground-level ozone, which forms when vehicle and industrial exhaust reacts chemically in the heat rather than being emitted directly. On stagnant, high-pressure summer days the Arkansas River Valley's usual wind can drop off, letting ozone build up instead of clearing out — which is why the Arkansas Department of Environmental Quality runs a monitor specifically for the Fort Smith metro area.

Does wildfire smoke ever reach Fort Smith?

It's not a defining part of Fort Smith's air the way it is in the Western US, but it does happen. In late July 2026, smoke from Canadian wildfires drifted far enough south to trigger air-quality advisories across parts of Arkansas. Those events are usually brief and diluted by the distance the smoke travels, but Canairy's alerts will catch one if it pushes your local reading past your threshold.

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 Fort Smith data come from?

Readings come from PurpleAir's network of laser particle sensors across Fort Smith 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.

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.