Air Quality in Auburn, Maine — Live
Live readings from PurpleAir sensors across Auburn and Lewiston — with free alerts the moment smoke or summer haze rolls in.
AQI 5 from 1 PurpleAir sensor · Trending down · data from PurpleAir
As of , the air quality in Auburn, Maine is AQI 5 — Good and falling — with PM2.5 at 0.9 µg/m³, from 1 live PurpleAir sensor. Canairy's verdict: Breathe easy.
For scale, that PM2.5 reading is below the World Health Organization's 24-hour guideline of 15 µg/m³. The WHO figure is a daily average and this is a live reading, so read it as a sense of magnitude rather than a formal exceedance — a brief spike and a bad day are not the same thing. More on the WHO guidelines
Pollen today in Auburn: weeds pollen is the strongest of the three at a low level, from Google's pollen forecast. Canairy shows the tree, grass and weed forecast beside the air reading on every plan, including the free one.
Free to download · Live data from PurpleAir & public monitors
Live PurpleAir sensor map for Auburn and Lewiston, Turner, Poland, Minot. Every dot is a real sensor, color-coded by current air quality.
Auburn's air is genuinely clean most of the year — Maine ties for 5th-best air quality in the country, and the old shoe mills that once defined the Twin Cities' economy are long gone, so there's no local smokestack driving the numbers. The exception has become summer, when prevailing winds carry Canadian wildfire smoke down into New England. That pattern has shown up almost every year since 2023, with Maine's own environmental regulators tracking it as a real and worsening trend, not a one-off.
What Canairy does for Auburn
A clear verdict
Not just a number — a plain-English call for Auburn: open the windows, or keep them shut.
Smoke alerts
A push or text the moment the air crosses your threshold — and again when it clears.
A heads-up before it's bad
Trend alerts catch the air turning, so you can close up the house before the smoke settles in.
Every place you care about
Home, work, the kids' school — across Auburn or across the country, on one screen.
Why Auburn's summers have gotten smokier since 2023
David Madore, deputy commissioner of the Maine Department of Environmental Protection, has said plainly that prevailing winds have been directing more and more wildfire smoke into New England in recent years. Auburn sits along the Androscoggin River directly across from Lewiston, and in August 2025 that river valley itself became the visual proof: news photos captured the sky over the water sitting under a blue-gray haze as Canadian wildfire smoke from Western Ontario, Manitoba, and Saskatchewan pushed south, with northern Maine rated unhealthy and western Maine — Auburn's part of the state — rated unhealthy for sensitive groups that weekend.
That wasn't an isolated event. Maine issued air quality alerts in June 2025, again in late July 2025, again in early August 2025, and the pattern continued into July 2026, when a smoke plume roughly 1,000 miles long and 250 miles wide settled over the state, cool enough to knock local temperatures down by about 10 degrees even as it thickened the air. What used to be a rare, dramatic event is turning into a near-annual feature of the Auburn summer.
Auburn's other real pollution source isn't local — it's transported ozone
On hot, sunny, stagnant days, Maine's air problem isn't anything made in Maine. The state's own DEP describes Maine as sitting downwind of ozone and ozone-forming pollution carried up from the south and west — sometimes called "the tailpipe" of the country because of how far that transport reaches. Coastal Maine usually catches the worst of it, but inland cities like Auburn can still see moderate-to-elevated ozone on the muggiest days of July and August, layered right on top of whatever wildfire smoke happens to be passing through.
That combination is what makes Auburn's air story different from a wildfire town's: there's no single named local fire to watch for. Instead, the two things that actually move Auburn's AQI — Canadian smoke drift and transported ozone — both arrive from hundreds of miles away, which is exactly why a single citywide forecast isn't enough. Conditions can shift from clean to hazy over a few hours as a plume moves through, with nothing happening locally to explain it.
What to actually do when the haze rolls in
Because Auburn's bad-air days arrive as smoke or ozone blowing in rather than a fire near town, the sky itself is a poor early warning — haze can be worse than it looks, and ozone on a bright clear day gives no visual cue at all. Checking a real number before deciding whether to run, bike the Androscoggin River trails, or send kids out for recess practice is the only reliable move, especially for anyone with asthma, a heart condition, or young kids and older adults in the house.
Canairy reads the PurpleAir sensors around Auburn and Lewiston continuously, so instead of guessing from the color of the sky over the river, you get a plain-English verdict tied to the places you've actually saved — home, school, the office — updated as the smoke or haze moves through and again once it clears.
Auburn air quality FAQ
What is the air quality in Auburn right now?
As of September 14, 2026 at 8:09 AM EDT, the air quality in Auburn, Maine is AQI 5 — Good — with PM2.5 at 0.9 µg/m³, the median of 1 live PurpleAir sensor. Open the windows. Great for outdoor activity.
Why does Auburn get hazy or smoky in summer?
Since 2023, Maine has seen prevailing winds carry Canadian wildfire smoke into New England far more often, and Auburn's western-Maine location has been in the affected zone during alerts in June, July, and August of 2025 and again in July 2026. On hot, stagnant days, transported ozone from pollution further south and west can add to it, even without any smoke in the sky.
Does Auburn have its own local sources of air pollution?
Not really anymore. Auburn's shoe-manufacturing mills, which once produced most of the world's white canvas shoes, closed decades ago, and the city has no major industrial or refinery sources today. Almost all of Auburn's worst air days come from outside the region entirely - Canadian wildfire smoke or ozone transported up from the south and west - which is why a local reading that updates in real time matters more than watching the local sky.
What the AQI numbers mean
| AQI | Category | What it means for you |
|---|---|---|
| 0–50 | Good | Open the windows. Great for outdoor activity. |
| 51–100 | Moderate | Sensitive groups may want to take it slower outside. |
| 101–150 | Unhealthy for Sensitive Groups | Kids, elderly, and respiratory conditions stay closer to home. |
| 151–200 | Unhealthy | Skip outdoor exercise. Close windows. |
| 201–300 | Very Unhealthy | Limit time outside. N95 if you must go. |
| 301+ | Hazardous | Health emergency. Stay inside, run filtration if you have it. |
Canairy lets you tighten these bands if you’re more sensitive than the EPA default, so an alert can fire before the official category changes. How to read the Air Quality Index
Where these readings come from
The AQI at the top of this page is the median of the 1 curated PurpleAir sensor Canairy tracks in and around Auburn, with outliers set aside so that one sensor brought indoors — or parked beside a barbecue — cannot set the number for a whole city. Every sensor behind it is listed above with its distance and bearing from the city center. There is no black box here.
In the app, a place you save resolves the same way first. When no neighborhood sensor is reporting it falls back to the nearest EPA AirNow monitor, and anything modeled rather than measured is labelled a regional estimate rather than passed off as a sensor reading. How low-cost sensors compare to regulatory monitors
About Canairy
Canairy is free to download. The free plan covers one saved place with live readings, a plain-English verdict, and push alerts when the air crosses a threshold you choose. Paid plans add more places, faster refreshes, and SMS alerts. It is built by two parents in Sonoma County, California, who got tired of guessing whether it was safe to send the kids outside. Why we built it
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Air quality near Auburn
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