Worst air pollution Waterbury, today and tomorrow
Today (16 July): Air quality in Waterbury is fair. AQI, NO2, and O3 are fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 1:00 AM (NO2: 39.8/100).
Tomorrow (17 July 2026): Air quality in Waterbury is fair. AQI improves to medium; NO2 decreases to medium; all other pollutants stay as today. Pollution peaks around 11:00 PM (NO2: 42.2/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Waterbury's air quality reflects the Naugatuck River valley's partial topographic enclosure between the Connecticut central uplands in the former brass manufacturing heartland, with vehicle emissions from I-84 and the legacy of heavy metals manufacturing contributing elevated PM2.5 alongside the surrounding Connecticut industrial corridor. The river valley creates concentration of emissions under calm conditions, while the broader New England regional airshed contributes upwind urban sources from the New York and New Haven corridor.
Today - 16 July | Pollution peaks at 01:00
AQI:
Fair
39.8/100
PM2.5 (fine particles):
Good
14.6/100
PM10 (coarse particles):
Good
15.0/100
NO2 (nitrogen dioxide):
Fair
39.8/100
O3 (ozone):
Fair
36.7/100
SO2 (sulfur dioxide):
Good
5.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.5/100
PM1 (ultrafine particles):
Good
9.8/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 23:00
AQI:
Medium
42.2/100
PM2.5 (fine particles):
Good
9.4/100
PM10 (coarse particles):
Good
3.8/100
NO2 (nitrogen dioxide):
Medium
42.2/100
O3 (ozone):
Fair
37.6/100
SO2 (sulfur dioxide):
Good
2.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.2/100
PM1 (ultrafine particles):
Good
7.8/100
Pollen forecast in Waterbury
View pollen forecastFrequently Asked Questions
Is air quality bad in Waterbury right now?
On 16 July 2026, overall air quality in Waterbury is fair. AQI is the main air quality indicator at 39.8/100. Pollution peaks around 1:00 AM (NO2: 39.8/100).
Will air quality be worse tomorrow in Waterbury?
On 17 July 2026, air quality conditions in Waterbury will be similar to today, with O3 forecast at fair at 37.6/100. Pollution peaks around 11:00 PM (NO2: 42.2/100).
When is air pollution at its worst in Waterbury?
Air quality across Waterbury rises and falls with the seasons. In short, the shoulder seasons bring the most consistently clean air of the year, whereas the combination of local heat and imported regional haze peaks during summer. Winter cold fronts tend to clear the air quickly, so extended pollution episodes are relatively uncommon.
Are air quality levels in Waterbury based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
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Data provided by Airmine — Last update: 16 July 2026 at 10:33 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
For long term forecasts and maps, see the Airmine app