Air Quality in Warren, Michigan — Live
Live readings from PurpleAir sensors across Warren — with free alerts when summer ozone or wildfire smoke moves in.
AQI 8 from 4 PurpleAir sensors · Holding steady · data from PurpleAir
As of , the air quality in Warren, Michigan is AQI 8 — Good and holding steady — with PM2.5 at 1.4 µg/m³, the median of 4 live PurpleAir sensors reading 0 to 8. 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 Warren: grass pollen is the strongest of the three at a very 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 Warren and Center Line, Sterling Heights, Eastpointe, Madison Heights. Every dot is a real sensor, color-coded by current air quality.
Sensor by sensor in Warren
The sensors Canairy reads in Warren agree right now — all 4 sit in the Good band, a 8-point spread — so the city-wide number is a fair description of the whole area today.
| From city center | AQI | Category |
|---|---|---|
| 1.1 mi SSW | 0 | Good |
| 3.2 mi ENE | 8 | Good |
| 4.6 mi SSW | 8 | Good |
| 5.2 mi NE | 7 | Good |
Warren's air is unremarkable most weeks of the year — this is a flat, built-out inner-ring suburb with no valley, basin, or coastline to trap or clear anything. The exception is summer: on hot, still afternoons, ground-level ozone builds up across the whole Detroit region, and in the worst years, like June 2023, Canadian wildfire smoke drifts down and adds fine particles on top of it.
What Canairy does for Warren
A clear verdict
Not just a number — a plain-English call for Warren: 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 Warren or across the country, on one screen.
A federal court just put Warren's ozone problem back on the books
On December 5, 2025, the U.S. Court of Appeals for the Sixth Circuit ruled in Sierra Club v. EPA that the agency broke the Clean Air Act when it declared the seven-county Southeast Michigan area — Wayne, Oakland, Macomb, Washtenaw, Livingston, St. Clair, and Monroe counties, which includes Warren — in attainment for the 2015 ozone standard back in May 2023. The court found that Michigan's EGLE had never actually adopted the pollution-control rules the redesignation depended on, and sent the region back to nonattainment status.
The rules in question are RACT standards — reasonably available control technology — for the volatile organic compounds and nitrogen oxides that cook into ozone in summer heat, and they specifically cover auto-painting operations, asphalt mixers, and refinery processes. That matters here because Warren itself is one of the most industrial suburbs in the country, home to the GM Technical Center, the Army's Detroit Arsenal Tank Plant, and the Warren Truck Assembly plant. EGLE now has one to two years to write those rules before it can try the redesignation again.
Detroit's East 7 Mile monitor tells Warren's story too
The closest long-running ozone monitor to Warren sits at East 7 Mile in Detroit, about a mile south of Warren's own border at 8 Mile Road. Reporting on the ozone ruling notes that station has logged readings above the federal 70 parts-per-billion standard for a decade, in a part of the region with some of the highest asthma hospitalization rates in Michigan — a reminder that ozone doesn't stop at a city limit, and the air Warren shares with its southern neighbor is the same air a regulator has been flagging for years.
Ozone in this part of Michigan is a summer-afternoon problem, not a year-round one: it needs heat and sunlight to form, so it tends to peak on the same hot, hazy days that also bring the region's worst humidity. Combined with Warren's own traffic corridors — I-696, M-53 (Van Dyke), and M-97 (Groesbeck) all cut through residential neighborhoods — the exhaust and industrial VOCs have plenty of raw material to work with on a still July afternoon.
June 2023 showed what a real smoke month looks like
Canadian wildfire smoke settled over southeast Michigan for stretches of June 2023, and the City of Warren issued its own air quality alert as fine particulate matter climbed — state officials were projecting conditions ranging from unhealthy for sensitive groups to unhealthy for everyone that week. Regional PM2.5 readings reached roughly 100 micrograms per cubic meter, close to triple the annual health standard, and Michigan Public reported the American Lung Association's warning that the smoke was dangerous for everyone, not just people with asthma or heart conditions.
That kind of episode is still the exception in Warren, not the rule — most summers pass without a smoke event this severe. But it showed how fast a normal week can turn: clear one day, an official alert the next, with no valley or ridge nearby to hold the smoke in or help it clear faster. When it happens again, the only way to know what's actually happening over your own street is a live reading, not a statewide forecast.
Warren air quality FAQ
What is the air quality in Warren right now?
As of September 14, 2026 at 8:10 AM EDT, the air quality in Warren, Michigan is AQI 8 — Good — with PM2.5 at 1.4 µg/m³, the median of 4 live PurpleAir sensors. Open the windows. Great for outdoor activity.
Why did a court ruling change Warren's air quality status?
On December 5, 2025, the Sixth Circuit Court of Appeals ruled that the EPA had wrongly declared Southeast Michigan, including Macomb County and Warren, in compliance with federal ozone standards in 2023 — because the state had never enforced the pollution controls that decision relied on. The seven-county region is back in ozone nonattainment while Michigan's EGLE writes new rules for industrial VOC and nitrogen oxide sources.
Did wildfire smoke really reach Warren?
Yes. In June 2023, smoke from Canadian wildfires settled over southeast Michigan for days, and the City of Warren issued its own air quality alert as fine particle levels climbed toward roughly triple the annual health standard. It was described at the time as an unprecedented month for air quality across the state.
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 4 curated PurpleAir sensors Canairy tracks in and around Warren, 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 Warren
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