Air Quality in Paterson, New Jersey — Live

Live readings from PurpleAir sensors across Paterson — with free alerts when summer ozone or highway pollution spikes.

Live Paterson AQI from nearby PurpleAir sensors loads when this page opens in a browser, along with a live sensor map covering Paterson and Clifton, Hawthorne, Totowa, Fair Lawn.

Most days, Paterson's air doesn't make headlines. This isn't wildfire country, and the sky rarely turns orange. But Passaic County sits inside one of the country's most stubborn ozone-nonattainment zones, and on hot, still summer afternoons, exhaust from across the New York City metro cooks into smog that settles over the city. Add Interstate 80 running straight through town, and Paterson's real air-quality story is less about fire season and more about summer ozone and everyday traffic.

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.

Paterson's air problem is ozone, not wildfire smoke

Passaic County is part of the New York-Northern New Jersey-Long Island ozone nonattainment area, one of the most persistent ground-level ozone problems in the country. EPA's Green Book classifies the area Severe-15 under the 2008 8-hour ozone standard — one of the worst categories on the books — and it is still rated Serious under the tighter 2015 standard. From roughly May through September, hot, sunny, low-wind days let vehicle and industrial exhaust from across the metro region react into smog that drifts over Paterson along with the rest of northern New Jersey.

Unlike wildfire smoke, ozone doesn't announce itself with a hazy or orange sky. The worst ozone days often look like perfectly clear, sunny summer afternoons, because strong sunlight and heat are exactly what the chemical reaction needs to run. That mismatch between how the day looks and what's actually in the air is a big part of why a plain-English reading matters more here than a glance out the window.

Interstate 80 runs straight through the city

Interstate 80 cuts directly through Paterson, and the Garden State Parkway passes just south of the city near Clifton, so a large share of Paterson's neighborhoods sit within a few blocks of a major diesel truck corridor. Traffic pollution — fine particles and nitrogen oxides — runs highest right along these routes and fades with distance, which is part of why one citywide number can miss a lot: a block near I-80 and a block near Great Falls a mile away can be breathing meaningfully different air on the same afternoon.

The Passaic River winds through the city and drops 77 feet at the Great Falls, the waterpower that built Paterson into the 19th-century mill town known as Silk City. Many of those old textile and machine-shop buildings still stand along the riverbanks, now part of Paterson Great Falls National Historical Park. The mills left some legacy contamination in the soil and river sediment, but the everyday air-quality story here in 2026 is traffic and regional ozone, not the old factories.

Paterson's kids carry a higher asthma burden than the rest of the state

City-level health data shows Paterson has markedly higher emergency-department visit rates for asthma than both Passaic County and New Jersey as a whole. Researchers looking at the gap have pointed to a mix of older housing stock, environmental exposures like traffic emissions, and barriers to routine asthma care, rather than any single cause — a place-based problem more than a single-source one.

The one real exception to Paterson's usual pattern came in June 2023, when smoke from Canadian wildfires gave New Jersey its worst air-quality day in 43 years. On June 7, fifteen monitoring sites statewide recorded PM2.5 above the federal 24-hour standard, and Newark and Paterson were both named among the northern New Jersey communities hit hardest as the sky turned orange and AQI readings reached hazardous levels. It was a one-off, not a seasonal pattern, but it showed how far smoke can travel and how fast a clear day can turn dangerous.

Paterson air quality FAQ

What is the air quality in Paterson right now?

This page shows the current AQI for Paterson, 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 does Paterson's air get worse in summer?

Passaic County sits inside the New York-Northern New Jersey-Long Island ozone nonattainment area, historically one of the most severe in the country under the Clean Air Act. On hot, sunny, windless days between May and September, vehicle and industrial exhaust from across the metro area reacts in the heat to form ground-level ozone, which tends to peak in the afternoon. Unlike smoke, ozone can be worst on days that look perfectly clear.

Does Interstate 80 affect Paterson's air quality?

Interstate 80 runs directly through Paterson, and neighborhoods closest to the highway see higher levels of traffic pollution — fine particles and nitrogen oxides — than areas just a few blocks away. That's part of why Canairy reads sensors block by block instead of relying on one citywide average.

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 Paterson data come from?

Readings come from PurpleAir's network of laser particle sensors across Paterson 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.

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.