Air Quality in Mesa, Arizona — Live

Live readings from PurpleAir sensors across Mesa — with free alerts the moment the air turns.

Live Mesa AQI from nearby PurpleAir sensors loads when this page opens in a browser, along with a live sensor map covering Mesa and Gilbert, Chandler, Tempe, Apache Junction.

Mesa's name is on the federal paperwork. The ozone nonattainment area covering metro Phoenix is officially the Phoenix-Mesa area, designated Moderate for the 2015 standard of 70 parts per billion, and the EPA let that classification stand on 23 March 2026 rather than upgrading it to Serious. But the shared regional ozone problem is only part of what a sensor on this side of the Valley picks up. Mesa sits with the Tonto National Forest and the Superstitions at its back and open, still-developing ground on its eastern edge, and both of those show up in the readings before they show up in Phoenix.

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.

The fires that put smoke over Mesa start close by

On 13 June 2020 a human-caused fire started near the intersection of Bush Highway and State Route 87, in the Tonto National Forest northeast of the city — a stretch of desert most of Mesa knows from the Lower Salt. The Bush Fire burned 193,455 acres before it was contained on 6 July. Within three days it had run past 64,500 acres at zero containment and was the largest fire burning anywhere in the United States, with evacuation orders reaching Tonto Basin and Sunflower.

A year later the Telegraph Fire began near Superior on 4 June 2021, about forty miles east along US 60, and burned 180,757 acres before containment on 3 July. It destroyed 51 structures and emptied Top-of-the-World and the western edge of Miami, and was the largest wildfire in the country that season until Oregon's Bootleg Fire passed it in mid-July. Neither fire touched Mesa. Both were close enough to put smoke over it, which is the pattern worth planning around here: the fire is out in the hills, the smoke is in your street.

Dust here is a growth problem as much as a weather one

Monsoon dust storms are the dramatic version. The wall of dust that crossed the Valley on 12 July 2026 reached Mesa around Crismon Road and US 60, carried gusts near 39 mph, and was later graded a Category 3 on the five-point PHX-DUST scale that Arizona State built with the National Weather Service and ADEQ. On that scale a storm counts as Widespread when more than half the region's monitors pass 500 micrograms per cubic metre of PM10, and Long-Duration once it lasts three hours or more.

The quieter source is the ground itself. Metro Phoenix has been a serious nonattainment area for PM10 for decades, and Maricopa County's Rule 310.01 requires any open area or vacant lot with more than 500 square feet disturbed, left unused and undeveloped for more than 15 days, to be stabilised with surface gravel, a dust suppressant or planted ground cover. In a city still building out toward Queen Creek and the county line, that rule covers a lot of ground — and a windy afternoon over freshly scraped lots registers on a neighbourhood sensor long before any thunderstorm shows up on radar.

Ozone peaks on the afternoons you would most want to be outside

Maricopa County's ozone season runs April through September. Ozone is not emitted by anything; it forms when exhaust from vehicles and gas-powered equipment reacts in strong sunlight, so the worst readings come in the afternoon on the hottest, stillest days. ADEQ issues a High Pollution Advisory when the forecast crosses 100 AQI, and during one, residential wood burning is prohibited across the county and government crews stop using leaf blowers.

One practical caveat for this page: a PurpleAir sensor measures fine particles. It is very good at telling you about dust and smoke, and it does not measure ozone at all. On a clear, hot June afternoon with an ozone advisory in force, the sensors here can sit in the Good range while the pollutant behind the advisory stays invisible to them. Maricopa County's own regulatory monitor in Mesa, at Broadway Road and Brooks Avenue, is the instrument doing that job.

Mesa air quality FAQ

Why is there smoke in Mesa today?

Look northeast and east first. The Tonto National Forest and the country around Superior and Globe are the closest reliable fire ground, and both the Bush Fire in June 2020 and the Telegraph Fire in June 2021 burned well past 180,000 acres within smoke range of the East Valley. If it is summer and the haze arrived with wind rather than a fire, it may be dust rather than smoke — monsoon outflows between June and September can spike PM10 in minutes. On a cold winter evening, a low haze is more often wood smoke and exhaust held down by an inversion, which is the condition Maricopa County declares No Burn Days for.

What is the air quality in Mesa right now?

This page shows the current AQI for Mesa from PurpleAir sensors across the city, updated continuously. Mesa covers a lot of ground, and west Mesa near Tempe can read very differently from the newer edges out east on a dusty afternoon, so the map below shows every live sensor and you can pick the one nearest you. Maricopa County also runs a regulatory monitor in the city at Broadway Road and Brooks Avenue.

Does Mesa have its own air problem, or is it just Phoenix's?

Both, and the mix is different. The federal ozone nonattainment area is named Phoenix-Mesa and covers the whole metro, so summer ozone is genuinely shared with the rest of the Valley. What is more particular to this side is proximity — the Tonto National Forest, the Superstitions and the Salt River corridor put wildfire smoke and lifted dust closer to home, and the newer subdivisions out east back onto open, disturbed ground that Maricopa County has to regulate specifically under its vacant-lot dust rule.

Is it safe to exercise outdoors in Mesa in summer?

It depends which pollutant is the problem that day. On a still, hot afternoon between April and September, ozone is the likely one, and ADEQ posts a High Pollution Advisory when it is forecast above 100 AQI — that is the day to move a run to early morning, when ozone has not built up yet. During or just after a dust storm, PM10 is the problem, and the sensors on this page will show that plainly. Heat, of course, is its own separate question here.

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.

Get Canairy free on Google Play.