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)
25
Good
Waterbury, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
2.90 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
6.99 μg/m³
0
55
155
255
425
605+
26.70 ppb
0
55
71
86
201
201+
0.16 ppb
0
36
76
186
605
1005+
3.16 ppb
0
54
101
361
1250
2050+
0.12 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Waterbury, Connecticut
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AQI 24
Good
2.56μg/m³
PM2.5
10.06μg/m³
PM10
26.05ppb
O3
0.14ppb
SO2
4.16ppb
NO2
0.11ppm
CO
AQI 24
Good
2.51μg/m³
PM2.5
9.69μg/m³
PM10
26.08ppb
O3
0.14ppb
SO2
4.24ppb
NO2
0.12ppm
CO
AQI 24
Good
2.56μg/m³
PM2.5
10.35μg/m³
PM10
25.88ppb
O3
0.14ppb
SO2
4.25ppb
NO2
0.12ppm
CO
AQI 26
Good
2.40μg/m³
PM2.5
9.28μg/m³
PM10
27.95ppb
O3
0.15ppb
SO2
3.36ppb
NO2
0.12ppm
CO
AQI 22
Good
2.47μg/m³
PM2.5
9.35μg/m³
PM10
23.97ppb
O3
0.14ppb
SO2
4.60ppb
NO2
0.12ppm
CO
AQI 23
Good
2.47μg/m³
PM2.5
8.55μg/m³
PM10
24.98ppb
O3
0.14ppb
SO2
4.64ppb
NO2
0.12ppm
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 03:00:00 on 2026-02-11.
The best air quality in Waterbury, Connecticut was recorded at 03:00:00 on 2026-02-12.
The real-time air quality index in Waterbury, Connecticut is 24, currently categorized as Good.
The most common pollutant in Waterbury, Connecticut is O3.
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 2.599 μg/m3.
The current PM10 levels in Waterbury, Connecticut are 10.98 μg/m3.
The current carbon monoxide (CO) level in Waterbury, Connecticut is 0.117 ppm.
The current sulfur dioxide (SO2) levels in Waterbury, Connecticut are 0.146 ppb.
The current ozone (O3) levels at Waterbury, Connecticut is 25.905 ppm.
The current nitrogen dioxide (NO2) levels at Waterbury, Connecticut is 4.01 ppb.
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