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)
56
Moderate
Waterbury, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
11.89 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
22.01 μg/m³
0
55
155
255
425
605+
34.94 ppb
0
55
71
86
201
201+
0.31 ppb
0
36
76
186
605
1005+
5.65 ppb
0
54
101
361
1250
2050+
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Waterbury, Connecticut
Waterbury, Connecticut
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AQI 56
Moderate
11.84μg/m³
PM2.5
22.11μg/m³
PM10
36.09ppb
O3
0.31ppb
SO2
6.28ppb
NO2
0.20ppm
CO
AQI 54
Moderate
11.41μg/m³
PM2.5
20.92μg/m³
PM10
36.47ppb
O3
0.34ppb
SO2
6.34ppb
NO2
0.20ppm
CO
AQI 56
Moderate
11.68μg/m³
PM2.5
22.50μg/m³
PM10
36.53ppb
O3
0.32ppb
SO2
6.46ppb
NO2
0.21ppm
CO
AQI 56
Moderate
11.57μg/m³
PM2.5
52.72μg/m³
PM10
35.40ppb
O3
0.29ppb
SO2
4.76ppb
NO2
0.18ppm
CO
AQI 56
Moderate
11.67μg/m³
PM2.5
41.50μg/m³
PM10
39.22ppb
O3
0.32ppb
SO2
6.42ppb
NO2
0.22ppm
CO
AQI 49
Good
9.20μg/m³
PM2.5
33.83μg/m³
PM10
35.22ppb
O3
0.45ppb
SO2
6.60ppb
NO2
0.22ppm
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 2026-06-29.
The best air quality in Waterbury, Connecticut was recorded at 01:00:00 on 2026-06-29.
The real-time air quality index in Waterbury, Connecticut is 56, currently categorized as Moderate.
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 11.893 μg/m3.
The current PM10 levels in Waterbury, Connecticut are 22.01 μg/m3.
The current carbon monoxide (CO) level in Waterbury, Connecticut is 0.204 ppm.
The current sulfur dioxide (SO2) levels in Waterbury, Connecticut are 0.306 ppb.
The current ozone (O3) levels at Waterbury, Connecticut is 34.944 ppm.
The current nitrogen dioxide (NO2) levels at Waterbury, Connecticut is 5.646 ppb.
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