Air Quality in Warren, Michigan — Live
Live readings from PurpleAir sensors across Warren — with free alerts when summer ozone or wildfire smoke moves in.
Live Warren AQI from nearby PurpleAir sensors loads when this page opens in a browser, along with a live sensor map covering Warren and Center Line, Sterling Heights, Eastpointe, Madison Heights.
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.
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.
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?
This page shows the current AQI for Warren, 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 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 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 Warren data come from?
Readings come from PurpleAir's network of laser particle sensors across Warren and surrounding Macomb County 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.