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

Good
Fine
Moderate
Poor
Very poor
Hazardous
11.68 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
53.18 μg/m³
0
55
155
255
425
605+
39.91 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
Meriden, Connecticut
Meriden, Connecticut
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AQI 54
Moderate
11.31μg/m³
PM2.5
22.98μg/m³
PM10
32.48ppb
O3
0.28ppb
SO2
4.12ppb
NO2
0.17ppm
CO
AQI 54
Moderate
11.47μg/m³
PM2.5
28.25μg/m³
PM10
35.07ppb
O3
0.28ppb
SO2
5.11ppb
NO2
0.20ppm
CO
AQI 54
Moderate
11.48μg/m³
PM2.5
20.35μg/m³
PM10
32.16ppb
O3
0.28ppb
SO2
5.02ppb
NO2
0.22ppm
CO
AQI 54
Moderate
11.36μg/m³
PM2.5
23.58μg/m³
PM10
35.02ppb
O3
0.27ppb
SO2
3.93ppb
NO2
0.15ppm
CO
AQI 52
Moderate
9.85μg/m³
PM2.5
46.65μg/m³
PM10
34.04ppb
O3
0.27ppb
SO2
5.26ppb
NO2
0.16ppm
CO
AQI 54
Moderate
11.36μg/m³
PM2.5
23.58μg/m³
PM10
35.02ppb
O3
0.27ppb
SO2
3.93ppb
NO2
0.15ppm
CO
Air quality and pollutant data for Connecticut, USA are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.
Source: Ambee Data Sources
The air quality information for Meriden, Connecticut is updated every hour for accuracy.
In the past 24 hours, the air quality in Meriden, Connecticut was at its worst at 03:00:00 on 2026-06-29.
In the last 24 hours, the best air quality in Meriden, Connecticut was observed at 07:00:00 on 2026-06-29.
As of now, the AQI in Meriden, Connecticut is 56, indicating Moderate conditions.
Meriden, Connecticut air has the highest levels of PM2.5.
Poor air quality in Meriden, Connecticut means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Meriden, Connecticut are currently 11.679 μg/m3.
The PM10 concentration in Meriden, Connecticut is 53.18 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Meriden, Connecticut is 0.198 ppm.
Currently, Meriden, Connecticut has a sulfur dioxide (SO2) concentration of 0.307 ppb.
The current ozone (O3) level in Meriden, Connecticut at the moment is 39.915 ppm.
Nitrogen dioxide (NO2) level in Meriden, Connecticut at the moment is 5.653 ppb.
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