Stay updated with real-time air quality in Waterbury, Connecticut featuring accurate data on AQI, PM2.5, PM10, O3, NO2, SO2, and CO levels. Use our interactive map and detailed forecasts to monitor pollution trends, manage health risks, and plan your daily activities with confidence.
Live AQI (Air Quality Index)
33
Good
Waterbury, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.50 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
13.00 μg/m³
0
55
155
255
425
605+
30.86 ppb
0
55
71
86
201
201+
0.34 ppb
0
36
76
186
605
1005+
13.08 ppb
0
54
101
361
1250
2050+
0.21 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Waterbury, Connecticut
Waterbury, Connecticut
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AQI 31
Good
5.45μg/m³
PM2.5
13.39μg/m³
PM10
33.14ppb
O3
0.35ppb
SO2
10.87ppb
NO2
0.19ppm
CO
AQI 31
Good
5.35μg/m³
PM2.5
12.60μg/m³
PM10
33.45ppb
O3
0.37ppb
SO2
10.43ppb
NO2
0.18ppm
CO
AQI 33
Good
5.51μg/m³
PM2.5
13.29μg/m³
PM10
32.79ppb
O3
0.37ppb
SO2
10.31ppb
NO2
0.19ppm
CO
AQI 33
Good
5.80μg/m³
PM2.5
18.04μg/m³
PM10
34.77ppb
O3
0.37ppb
SO2
10.96ppb
NO2
0.18ppm
CO
AQI 33
Good
5.86μg/m³
PM2.5
13.89μg/m³
PM10
35.34ppb
O3
0.35ppb
SO2
10.74ppb
NO2
0.19ppm
CO
AQI 33
Good
6.19μg/m³
PM2.5
15.28μg/m³
PM10
31.21ppb
O3
0.39ppb
SO2
9.54ppb
NO2
0.20ppm
CO
Air quality measurements for Connecticut, USA meet strict US EPA standards. These measurements are collected from reliable sources, including satellites and ground-based monitoring systems. Advanced algorithms and machine learning techniques are applied to the data, factoring in variables such as traffic and population density, to ensure precision and reliability.
Source: Ambee Data Sources
Air quality data for Waterbury, Connecticut is updated on an hourly basis.
The worst air quality in Waterbury, Connecticut was recorded at 02:00:00 on 2026-05-14.
The best air quality in Waterbury, Connecticut was recorded at 01:00:00 on 2026-05-13.
The real-time air quality index in Waterbury, Connecticut is 33, currently categorized as Good.
The most common pollutant in Waterbury, Connecticut is PM2.5.
If the air quality in Waterbury, Connecticut is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in Waterbury, Connecticut at present are 5.501 μg/m3.
The current PM10 levels in Waterbury, Connecticut are 13.004 μg/m3.
The current carbon monoxide (CO) level in Waterbury, Connecticut is 0.215 ppm.
The current sulfur dioxide (SO2) levels in Waterbury, Connecticut are 0.342 ppb.
The current ozone (O3) levels at Waterbury, Connecticut is 30.862 ppm.
The current nitrogen dioxide (NO2) levels at Waterbury, Connecticut is 13.076 ppb.
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