Air Quality in Grand Forks, North Dakota — Live

Live readings from PurpleAir sensors across Grand Forks — with free alerts the moment smoke drifts down from Canada.

Live Grand Forks AQI from nearby PurpleAir sensors loads when this page opens in a browser, along with a live sensor map covering Grand Forks and East Grand Forks, Thompson, Larimore, Emerado.

Grand Forks sits in one of the flattest, most wide-open landscapes in North America, and most days its air matches that description — clean and unremarkable, well inside the Good range. The exception is wildfire smoke drifting down from Canada, which has pushed the Red River Valley into unhealthy territory in recent summers, including a rare statewide smoke event in May 2023 and a genuinely bad stretch in July 2021.

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.

Grand Forks breathes clean air until Canada's forests catch fire

The pattern has repeated in back-to-back years. On May 16-18, 2023, smoke drifting down from wildfires burning in Canada blanketed the entire state of North Dakota at once — a North Dakota Department of Environmental Quality staffer with 25 years on the job called it an exceptionally rare event. Weeks later, on June 14, 2023, smoke returned and pushed air quality into the red "unhealthy for everyone" category across Polk County, Minnesota, which includes East Grand Forks just across the river; officials advised residents to close windows, switch air conditioning to recirculate, and limit time outside.

It isn't a one-year story. In July 2021, smoke from wildfires burning in northern Canada, Oregon, Wyoming, and Montana settled over the Red River Valley for days, and the Minnesota Pollution Control Agency issued alerts covering Moorhead, Bemidji, Roseau, and East Grand Forks, with a brief spell reaching "very unhealthy" on July 21. None of those fires were anywhere near Grand Forks — the smoke arrived anyway, riding the wind for days after the flames themselves were old news.

The flattest ground on the continent doesn't stop smoke — it just lets it move through

Grand Forks sits at the bottom of what was once Glacial Lake Agassiz, an ice-age lake that left behind the Red River Valley — one of the flattest stretches of land in North America, with no hills or mountains nearby to block or trap the wind. That's a very different setup from a California valley city, where surrounding peaks can pen smoke in for a week; here, a big smoke event tends to arrive as one broad mass moving across the whole region at once, which is exactly why the DEQ described the May 2023 smoke as covering the entire state rather than one city or county.

The city is also only about 76 miles south of the Canadian border at Pembina, right on the route smoke takes down from Manitoba and Saskatchewan's boreal forests. That proximity means Grand Forks is often among the first US cities to catch a plume that started burning in another country days earlier. But "the whole region" still isn't "your yard" — smoke can sit thicker near the low ground along the Red River and Red Lake River than on higher ground a few blocks away, which is why Canairy reads sensors placed around the city rather than leaning on one regional number.

What actually helps on a smoke day in Grand Forks

Because good air is the norm here, it's easy to get caught off guard when a smoke advisory hits — especially for kids playing outdoor summer sports, UND students walking to class, or anyone with asthma or a heart condition. Check the AQI before committing to a few hours outside, not after your eyes start to sting. Close windows and switch the air conditioner to recirculate before the smoke smell fills the house — it's much harder to clear smoke out of indoor air than to keep it from getting in.

These events can also develop fast — clear skies one afternoon, a haze advisory by the next morning — so checking a live source matters more here than in places where bad air builds up slowly. Set a threshold in Canairy once, and it will tell you the moment the air over Grand Forks crosses it, and the moment it clears again.

Grand Forks air quality FAQ

What is the air quality in Grand Forks right now?

This page shows the current AQI for Grand Forks, 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 Grand Forks get smoky some summers?

Grand Forks sits about 76 miles south of the Canadian border, directly downwind of Manitoba and Saskatchewan's boreal forests. When those forests burn, the smoke has nothing to slow it down across the flat, open Red River Valley. It happened on a large scale in May and June 2023 and again in July 2021, each time pushing the region's air into unhealthy territory for days at a time.

How close is Grand Forks to the wildfires that cause its smoky air?

Often hundreds of miles. The smoke that reaches Grand Forks usually starts in Canadian boreal forests well north of the Pembina border crossing, about 76 miles away, or even farther west in Montana or the Pacific Northwest. Distance doesn't protect the city — smoke can ride the wind for days after a fire starts and still arrive thick enough to push the AQI into unhealthy ranges.

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 Grand Forks data come from?

Readings come from PurpleAir's network of laser particle sensors across Grand Forks and surrounding towns like East Grand Forks, 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.