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)
23
Good
Waterbury, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.40 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
8.01 μg/m³
0
55
155
255
425
605+
25.04 ppb
0
55
71
86
201
201+
0.13 ppb
0
36
76
186
605
1005+
7.86 ppb
0
54
101
361
1250
2050+
0.16 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Waterbury, Connecticut
Waterbury, Connecticut
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AQI 28
Good
4.80μg/m³
PM2.5
13.80μg/m³
PM10
29.95ppb
O3
0.16ppb
SO2
8.52ppb
NO2
0.23ppm
CO
AQI 29
Good
4.74μg/m³
PM2.5
13.46μg/m³
PM10
30.55ppb
O3
0.16ppb
SO2
8.28ppb
NO2
0.22ppm
CO
AQI 28
Good
4.77μg/m³
PM2.5
13.95μg/m³
PM10
29.99ppb
O3
0.16ppb
SO2
8.21ppb
NO2
0.23ppm
CO
AQI 27
Good
4.77μg/m³
PM2.5
11.35μg/m³
PM10
25.17ppb
O3
0.15ppb
SO2
8.04ppb
NO2
0.22ppm
CO
AQI 27
Good
4.64μg/m³
PM2.5
16.69μg/m³
PM10
27.96ppb
O3
0.17ppb
SO2
8.80ppb
NO2
0.24ppm
CO
AQI 30
Good
4.71μg/m³
PM2.5
14.55μg/m³
PM10
31.79ppb
O3
0.22ppb
SO2
5.65ppb
NO2
0.25ppm
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 04:00:00 on 2025-11-03.
The best air quality in Waterbury, Connecticut was recorded at 09:00:00 on 2025-11-03.
The real-time air quality index in Waterbury, Connecticut is 28, 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 4.799 μg/m3.
The current PM10 levels in Waterbury, Connecticut are 13.996 μg/m3.
The current carbon monoxide (CO) level in Waterbury, Connecticut is 0.232 ppm.
The current sulfur dioxide (SO2) levels in Waterbury, Connecticut are 0.158 ppb.
The current ozone (O3) levels at Waterbury, Connecticut is 29.895 ppm.
The current nitrogen dioxide (NO2) levels at Waterbury, Connecticut is 7.965 ppb.
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