Air Quality in Barre, Vermont — Live

Live readings from PurpleAir sensors across Barre — with free alerts when wood smoke or wildfire haze settles into the valley.

Live Barre AQI from nearby PurpleAir sensors loads when this page opens in a browser, along with a live sensor map covering Barre and Montpelier, Berlin, Websterville, Northfield.

Barre's air is genuinely clean most of the year — this is rural central Vermont, and Washington County's monitors typically sit in the "Good" range. The two times that changes are winter, when wood stoves and furnaces fill the Stevens Branch valley with smoke on cold, still nights, and summer, when smoke drifting down from Quebec can push the whole state into unhealthy territory, as it did for weeks in 2023.

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.

Barre calls itself the Granite Center of the World

Vast granite deposits at Millstone Hill, just outside downtown, turned Barre into the country's granite-cutting capital after the War of 1812 — the workforce grew from about 100 quarrymen in 1880 to roughly 3,000 by 1910. For decades, the air inside the sheds where that stone was cut was the real hazard: fine silica dust scarred workers' lungs and made silicosis the city's signature occupational disease.

Historian David R. Seager documented the fight against it in "Barre, Vermont Granite Workers and the Struggle Against Silicosis, 1890-1960." A later CDC mortality study of shed workers found that men employed before 1938 had breathed dust levels around 40 million particles per cubic foot, versus under 10 million after 1940, once ventilation and wet-cutting rules took hold. Deaths from silicosis and tuberculosis among granite workers effectively ended after that — a reminder that this city has been reading the air seriously for over a century, long before phone apps did it for you.

Winter is when Barre's own air quality actually dips

Barre sits low in the Stevens Branch and Jail Branch valleys, ringed by the hills that made it famous for granite, and on calm, cold nights that terrain traps air instead of letting it clear. The Vermont Department of Health points to wood stoves and furnaces as the dominant winter pollution source in towns like this, and monitoring for the Barre-Montpelier area shows the seasonal PM2.5 spikes concentrated in January, even though the annual average stays firmly in "Good" territory.

It's a quieter story than wildfire smoke, but a real one: a still January evening with half the neighborhood's chimneys going can push fine-particle readings noticeably higher than a summer afternoon, especially in the low-lying blocks closest to the Stevens Branch.

Barre isn't immune to Canadian wildfire smoke either

In late June 2023, smoke from close to 30 out-of-control wildfires in Quebec and Ontario pushed Vermont's air quality to levels the state had never recorded. Burlington's PM2.5 hit 174 micrograms per cubic meter overnight — an AQI of 224, "very unhealthy" — on the same day Montreal had the worst air quality of any city on Earth. The smoke wasn't a Lake Champlain problem alone; it settled statewide, and central Vermont spent stretches of that summer under the same hazy, orange-tinted skies.

Vermont Public's coverage that summer put it plainly: occasional smoky days from Quebec fires are now part of a Vermont summer, not a one-off. That's the pattern Barre shares with the rest of the state — clean air as the baseline, with real exceptions worth knowing about before they show up as a scratchy throat.

Barre air quality FAQ

What is the air quality in Barre right now?

This page shows the current AQI for Barre, calculated from PurpleAir sensors in and around the city 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 or out toward Websterville.

Why did Barre's air get smoky in the summer of 2023?

Smoke from nearly 30 wildfires burning in Quebec and Ontario blew south into Vermont in June and July 2023, pushing statewide air quality to its worst levels on record - Burlington alone hit a PM2.5-based AQI of 224. Central Vermont, including Barre, shared in that same smoke event, and Vermont officials now treat a few hazy days each summer as a recurring possibility rather than a fluke.

Does wood smoke affect Barre's air in the winter?

Yes. Barre sits low in the Stevens Branch valley, and on cold, still nights the surrounding hills trap smoke from wood stoves and furnaces close to the ground. The Vermont Department of Health names residential wood heat as the leading winter air pollution source in valley towns like this, with the biggest seasonal upticks typically showing up in January.

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 Barre data come from?

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