Stay updated with real-time air quality in Ansonia, 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)
43
Good
Ansonia, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.99 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
19.38 μg/m³
0
55
155
255
425
605+
46.30 ppb
0
55
71
86
201
201+
0.31 ppb
0
36
76
186
605
1005+
4.71 ppb
0
54
101
361
1250
2050+
0.19 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Ansonia, Connecticut
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AQI 43
Good
4.99μg/m³
PM2.5
19.38μg/m³
PM10
46.30ppb
O3
0.31ppb
SO2
4.71ppb
NO2
0.19ppm
CO
AQI 43
Good
4.99μg/m³
PM2.5
19.38μg/m³
PM10
46.30ppb
O3
0.31ppb
SO2
4.71ppb
NO2
0.19ppm
CO
AQI 42
Good
5.18μg/m³
PM2.5
20.11μg/m³
PM10
45.14ppb
O3
0.31ppb
SO2
4.63ppb
NO2
0.19ppm
CO
AQI 43
Good
4.95μg/m³
PM2.5
13.05μg/m³
PM10
46.34ppb
O3
0.30ppb
SO2
4.86ppb
NO2
0.17ppm
CO
AQI 42
Good
5.36μg/m³
PM2.5
13.50μg/m³
PM10
44.93ppb
O3
0.32ppb
SO2
3.47ppb
NO2
0.22ppm
CO
AQI 43
Good
5.39μg/m³
PM2.5
13.69μg/m³
PM10
45.57ppb
O3
0.30ppb
SO2
4.09ppb
NO2
0.20ppm
CO
Air quality data and pollutant measurements for Connecticut, USA adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.
Source: Ambee Data Sources
The air quality for Ansonia, Connecticut is updated every hour.
The worst air quality in Ansonia, Connecticut in the last 24 hours was observed at 01:00:00 on 2026-03-29.
In the last 24 hrs, the best air quality in Ansonia, Connecticut was observed at 03:00:00 on 2026-03-29.
The current air quality in Ansonia, Connecticut is 43, categorized as Good based on real-time data.
The most common pollutant in Ansonia, Connecticut is O3.
If the air quality in Ansonia, Connecticut is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Ansonia, Connecticut is 4.986 μg/m3.
The current PM10 concentration at Ansonia, Connecticut is 19.378 μg/m3.
The current carbon monoxide (CO) concentration at Ansonia, Connecticut is 0.187 ppm.
The current sulfur dioxide (SO2) concentration at Ansonia, Connecticut is 0.31 ppb.
The current ozone (O3) concentration at Ansonia, Connecticut is 46.305 ppm.
The current nitrogen dioxide (NO2) concentration at Ansonia, Connecticut is 4.707 ppb.
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