Air Quality in Lakewood, Colorado — Live
Live readings from PurpleAir sensors across Lakewood — with free alerts when ozone or smoke moves in.
Live Lakewood AQI from nearby PurpleAir sensors loads when this page opens in a browser, along with a live sensor map covering Lakewood and Golden, Wheat Ridge, Morrison, Edgewater.
Most of the year, Lakewood's air is unremarkable — clean enough that it doesn't make the local news. The exception is summer, when Lakewood shares in one of the most persistent ozone problems in the country: Jefferson County sits inside the Denver Metro/North Front Range area, which the EPA classifies as a "Severe" ozone nonattainment zone. On hot, sunny, windless days from late May through August, the air quality advisory that covers the whole Front Range corridor covers Lakewood too — Jefferson County's own alert system was still flagging one as this page was written, extended through August 1, 2026.
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.
Lakewood sits inside Colorado's toughest ozone category
Jefferson County, and Lakewood with it, is part of the Denver Metro/North Front Range ozone nonattainment area — a designation the EPA bumped from Moderate to Serious in December 2019 after the region missed its federal deadline, then bumped again to Severe in October 2022. The area now has until July 20, 2027 to meet the federal 8-hour ozone standard, and Denver has repeatedly ranked among the American Lung Association's most ozone-polluted metro areas in the country.
Ozone isn't smoke from a single source — it forms when tailpipe exhaust and oil-and-gas emissions from across the Front Range react with strong sun. Lakewood's elevation, higher even than downtown Denver's mile-high mark at 5,656 feet, means more intense UV to drive that chemistry, and the metro area's heavy car dependence supplies the raw material every day of ozone season.
The mountains recirculate the same polluted air over the foothills
NASA and NOAA field campaigns based in the Front Range (FRAPPE and DISCOVER-AQ) tracked something specific to this geography: daytime heating pushes polluted air up against the mountains, and as the ground cools in the evening that same air drifts back down over the foothill communities it came from, instead of clearing out. Lakewood sits almost exactly where the plains meet that foothill band, near Green Mountain and the edge of the Rockies.
That pattern shows up in real advisories, not just research papers. The Jefferson County alert extended through August 1, 2026 specifically warned that the highest ozone concentrations were expected "in the western portions of the northern Colorado Front Range, including the lower foothills" — a description that fits Lakewood's own address about as closely as a forecast can.
Ozone season is summer; winter brings back the old "brown cloud"
CDPHE runs daily ozone notifications from May 31 through August 31 each year, and Lakewood shares whatever number the Front Range corridor reports, since ozone drifts across city lines rather than respecting them. The clearest stretches tend to come with a steady wind off the mountains; the worst build over days of hot, calm, sunny weather, which is exactly the pattern behind the advisory still in effect as this was written.
Winter brings a different, older problem: the visible haze Denver-area residents have called the "brown cloud" since at least the 1970s, when cold air pools in the South Platte valley and traps vehicle exhaust and wood smoke close to the ground until a storm or strong wind scours it out. Wildfire smoke — from Colorado's own Front Range fires and occasionally from fires as far away as Canada or Nebraska — can also settle over Lakewood in a bad summer, layering on top of the ozone problem rather than replacing it.
Lakewood air quality FAQ
What is the air quality in Lakewood right now?
This page shows the current AQI for Lakewood, 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, from Green Mountain to the Bear Creek corridor.
Why does Lakewood get ozone advisories in summer?
Jefferson County sits inside the Denver Metro/North Front Range area, which the EPA has classified "Severe" nonattainment for ozone — the toughest category on the Front Range. Hot, sunny, calm days from late May through August let tailpipe and oil-and-gas emissions cook into ozone in strong sun, and Lakewood's foothill-edge location is close to where Jefferson County and the National Weather Service have flagged the highest concentrations landing.
What is Denver's "brown cloud"?
It's the visible haze that has settled over the Denver metro area since at least the 1970s, most often in winter, when cold, still air pools in the South Platte valley and traps vehicle exhaust and wood smoke close to the ground. Lakewood sits inside that same air basin, so a still, cold week can turn hazy even without a single wildfire burning.
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.
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.
Where does Canairy's Lakewood data come from?
Readings come from PurpleAir's network of laser particle sensors across Lakewood 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.
Get Canairy free on Google Play.