Air Quality in Bridgeport, Connecticut — Live
Live readings from PurpleAir sensors across Bridgeport — with free alerts the moment smoke drifts in.
AQI 29 from 5 PurpleAir sensors · Holding steady · data from PurpleAir
As of , the air quality in Bridgeport, Connecticut is AQI 29 — Good and holding steady — with PM2.5 at 5.3 µg/m³, the median of 5 live PurpleAir sensors reading 25 to 38. 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 Bridgeport: weeds pollen is the strongest of the three at a moderate 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 Bridgeport and Stratford, Fairfield, Trumbull, Milford. Every dot is a real sensor, color-coded by current air quality.
Sensor by sensor in Bridgeport
The sensors Canairy reads in Bridgeport agree right now — all 5 sit in the Good band, a 13-point spread — so the city-wide number is a fair description of the whole area today.
| From city center | AQI | Category |
|---|---|---|
| 1.1 mi SW | 25 | Good |
| 1.4 mi S | 38 | Good |
| 1.5 mi S | 27 | Good |
| 2.6 mi SW | 29 | Good |
| 3.9 mi SW | 31 | Good |
Bridgeport's air problem is mostly the kind you cannot see. The city sits on Long Island Sound at the receiving end of the New York metro's smog, and Fairfield County earns a failing grade for ozone year after year, the worst ozone in New England in the American Lung Association's State of the Air reports. Wildfire smoke, like the Canadian haze that settled over the coast in June 2023, is the rarer but sharper threat.
What Canairy does for Bridgeport
A clear verdict
Not just a number — a plain-English call for Bridgeport: 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 Bridgeport or across the country, on one screen.
What the air in Bridgeport is doing next
| When | AQI | Expected air quality | Main pollutant |
|---|---|---|---|
| Today | 33 | Good | PM2.5 |
| Tomorrow | 30 | Good | ozone |
| Monday | 33 | Good | PM2.5 |
| Tuesday | 44 | Good | PM2.5 |
Forecast from EPA AirNow for the Bridgeport reporting area. Canairy watches the live sensors against it and tells you when the air actually crosses your threshold, rather than leaving you to check.
The smog blows in off the Sound
Most of Bridgeport's bad-air days are ozone days, and much of that ozone is not made here. On summer afternoons the prevailing wind carries the New York City pollution plume across Long Island Sound to the Connecticut shore. The cool water of the Sound holds those gases in a shallow, stable layer just above the surface, and then the afternoon sea breeze pushes the whole mix onshore and inland.
That is why a shoreline county with no giant local smokestack still posts the worst ozone in New England. Connecticut's environmental agency studies exactly this pattern through the Long Island Sound Tropospheric Ozone Study, which has tracked the plume running from the city up the coast. It means Bridgeport's worst air often arrives on a warm, sunny day with a light breeze off the water, the kind of afternoon that feels like the last one you would worry about.
Traffic and ozone, not the old coal plant
For decades the Bridgeport Harbor Station coal plant loomed over the harbor. Its last coal unit, running since 1968, shut down on June 1, 2021, the final coal-fired plant in PSEG's fleet, and a newer natural gas plant took over the site. That closure was real progress for local soot and particle pollution.
But ozone is a different animal. It forms when exhaust from tailpipes and other sources bakes in sunlight, and Bridgeport has no shortage of tailpipes, with Interstate 95 cutting straight through the city and heavy traffic feeding it all day. Retiring the coal plant did not fix the smog problem, which is why Fairfield County's ozone grade has stayed an F and actually worsened for three straight years in the latest report.
When the smoke does come
Connecticut is not wildfire country, but it is downwind of places that are. In June 2023 smoke from roughly 160 fires burning in Quebec and Northern Ontario drifted south and blanketed the Northeast. Most of Connecticut saw unhealthy air for days, and Fairfield County and Bridgeport were among the hardest-hit parts of the state, with alerts warning people to limit time outdoors.
Those episodes are the opposite of the slow summer ozone problem. They arrive fast, the sky turns hazy and orange, and fine particles spike into the range that bothers healthy people, not just sensitive groups. Knowing which kind of bad-air day you are having, a smoggy ozone afternoon or a wall of wildfire smoke, changes what you do about it, and it is exactly the sort of thing a live sensor reading can tell you at a glance.
Bridgeport air quality FAQ
What is the air quality in Bridgeport right now?
As of September 5, 2026 at 8:10 AM EDT, the air quality in Bridgeport, Connecticut is AQI 29 — Good — with PM2.5 at 5.3 µg/m³, the median of 5 live PurpleAir sensors. Open the windows. Great for outdoor activity.
Why does Bridgeport get so much smog and ozone?
Fairfield County posts the worst ozone pollution in all of New England, and much of it blows in rather than starting here. On summer afternoons the wind carries the New York City pollution plume across Long Island Sound to the Connecticut shore, where the cool water traps it in a shallow layer and the sea breeze pushes it inland. Local traffic on Interstate 95 and other roads adds to it, since ozone forms when exhaust bakes in sunlight. That combination is why the county has earned a failing ozone grade year after year.
Didn't Bridgeport's coal plant close? Why is the air still rated poorly?
The last coal unit at Bridgeport Harbor Station shut down on June 1, 2021, which helped with soot and particle pollution near the harbor. But the county's main problem is ozone smog, which comes largely from vehicle exhaust reacting in sunlight and from pollution transported off Long Island Sound. Closing the coal plant did not change those sources, so Fairfield County's ozone grade has stayed an F.
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 5 curated PurpleAir sensors Canairy tracks in and around Bridgeport, 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
Go deeper
Air quality near Bridgeport
We watch Bridgeport's air. You live your life.
Set your threshold once and get a heads-up only when the air actually changes for you. Free on the App Store & Google Play.