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)
27
Good
Ansonia, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.82 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
15.83 μg/m³
0
55
155
255
425
605+
24.92 ppb
0
55
71
86
201
201+
0.24 ppb
0
36
76
186
605
1005+
6.33 ppb
0
54
101
361
1250
2050+
0.21 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Ansonia, Connecticut
Ansonia, Connecticut
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AQI 33
Good
5.73μg/m³
PM2.5
15.91μg/m³
PM10
23.88ppb
O3
0.53ppb
SO2
3.94ppb
NO2
0.24ppm
CO
AQI 33
Good
5.73μg/m³
PM2.5
15.91μg/m³
PM10
23.88ppb
O3
0.53ppb
SO2
3.94ppb
NO2
0.24ppm
CO
AQI 33
Good
5.88μg/m³
PM2.5
16.55μg/m³
PM10
23.70ppb
O3
0.53ppb
SO2
4.04ppb
NO2
0.24ppm
CO
AQI 33
Good
5.82μg/m³
PM2.5
15.20μg/m³
PM10
24.19ppb
O3
0.53ppb
SO2
3.91ppb
NO2
0.24ppm
CO
AQI 38
Good
6.58μg/m³
PM2.5
19.92μg/m³
PM10
25.61ppb
O3
0.57ppb
SO2
3.76ppb
NO2
0.24ppm
CO
AQI 38
Good
7.05μg/m³
PM2.5
12.37μg/m³
PM10
24.09ppb
O3
0.53ppb
SO2
4.07ppb
NO2
0.24ppm
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 12:00:00 on 2026-08-14.
In the last 24 hrs, the best air quality in Ansonia, Connecticut was observed at 04:00:00 on 2026-08-14.
The current air quality in Ansonia, Connecticut is 27, categorized as Good based on real-time data.
The most common pollutant in Ansonia, Connecticut is PM2.5.
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 4.817 μg/m3.
The current PM10 concentration at Ansonia, Connecticut is 15.83 μg/m3.
The current carbon monoxide (CO) concentration at Ansonia, Connecticut is 0.208 ppm.
The current sulfur dioxide (SO2) concentration at Ansonia, Connecticut is 0.236 ppb.
The current ozone (O3) concentration at Ansonia, Connecticut is 24.917 ppm.
The current nitrogen dioxide (NO2) concentration at Ansonia, Connecticut is 6.333 ppb.
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