Air Quality in Bismarck, North Dakota — Live

Live readings from PurpleAir sensors across Bismarck — with free alerts when Canadian wildfire smoke drifts into North Dakota.

Live Bismarck AQI from nearby PurpleAir sensors loads when this page opens in a browser, along with a live sensor map covering Bismarck and Mandan, Lincoln, Menoken, New Salem.

Bismarck sits out in the open on the North Dakota plains, and on most days that openness works in the city's favor — there's no valley or ridgeline here to trap anything, and the wind that moves across Burleigh County clears out haze about as fast as it builds up. The exception is wildfire smoke drifting down from Canada, which has turned Bismarck's sky orange and pushed the statewide AQI into the Unhealthy and, at times, Hazardous range during recent fire seasons — most notably in May and again over August 29-30, 2023, when North Dakota's Department of Environmental Quality issued health warnings covering nearly the entire state.

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.

Bismarck's air is usually good — flat, windy plains see to that

Bismarck sits on the east bank of the Missouri River at about 1,745 feet of elevation, on wide-open Great Plains terrain with nothing resembling the mountains or valley walls that trap smoke in places like California wine country. There's little here to hold pollution in place: the wind that moves across central North Dakota on a typical day carries particulates and haze out of the area about as fast as anything puts them in. On an ordinary day, Bismarck's monitored PM2.5 sits in the single digits, well inside the EPA's Good range.

That's also why North Dakota's Department of Environmental Quality runs a monitoring station in Bismarck year-round rather than only during fire season — Burleigh County doesn't have a refinery, a major highway bottleneck, or heavy industry pushing everyday pollution, so a quiet baseline is the norm here rather than something achieved by controlling local sources. It's precisely because that baseline is so calm that a smoke event stands out as sharply as it does.

The real story is smoke that starts hundreds of miles away, in Canada

North Dakota doesn't have its own wildfire problem on the scale of the Rockies or the West Coast, but it sits directly downwind of the boreal forests of Saskatchewan, Manitoba, and Alberta, and when those provinces have a bad fire year, the smoke travels south. In May 2023, and again over August 29-30, 2023, smoke from Canadian wildfires pushed air quality across nearly the entire state into the Unhealthy, Very Unhealthy, and even Hazardous categories — the state's monitoring maps that week showed Bismarck under the same red, purple, and maroon bands as the rest of North Dakota.

It happened again in September 2025, when the state's Department of Environmental Quality issued another advisory as Canadian wildfire smoke drifted back across North Dakota, warning people with asthma, heart conditions, and other respiratory sensitivities to limit time outdoors. The department now keeps a standing wildfire-smoke monitoring page that cross-references EPA AirNow data with the Canadian government's Firesmoke.ca forecast model, because this isn't a one-time event — it's a recurring risk most summers and into early fall.

Why one number for the metro doesn't tell the whole story

Smoke from Canada doesn't arrive on a schedule, and it doesn't sit over Bismarck evenly. A front pushing smoke down from Saskatchewan can lay a thick layer over one side of the city while the air along the river bottoms stays noticeably clearer, or the reverse, depending on which way the wind is moving that day. That's a different problem than the terrain-trapped smoke you'd see in a mountain valley — here it's about which direction the plume happens to be sliding across the plains, and that can shift within a few hours.

Because Bismarck and Mandan sit on opposite banks of the Missouri River, checking a single number for 'the metro area' can miss what's actually happening at your house. Canairy reads the sensors near the places you've actually saved instead of one reading for the whole region, so you're not guessing whether a smoke report from one side of the river tells you anything about the other.

Bismarck air quality FAQ

What is the air quality in Bismarck right now?

This page shows the current AQI for Bismarck, calculated from PurpleAir sensors across the city and Burleigh County and updated continuously. The map below shows every live sensor, so you can check the reading closest to your own neighborhood, whether that's downtown, north Bismarck, or across the river in Mandan.

Why does Bismarck get smoky in summer?

Bismarck sits downwind of the boreal forests of Saskatchewan, Manitoba, and Alberta, and when Canada has a bad wildfire year the smoke travels south. That happened twice in 2023 — in May and again over August 29-30 — when smoke pushed air quality across North Dakota into the Unhealthy, Very Unhealthy, and Hazardous categories, and again in September 2025 when the state issued another advisory. It isn't a local fire risk; it's prairie wind carrying someone else's smoke this direction.

Is Bismarck's air quality usually good?

Yes. Bismarck sits on open Great Plains terrain with no valley walls or mountains to trap pollution, and the wind that moves through Burleigh County most days clears out haze quickly. On a typical day the city's PM2.5 readings sit well inside the EPA's Good range — the exceptions are the Canadian wildfire smoke events that roll through most summers.

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 Bismarck data come from?

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