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)
22
Good
Meriden, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.48 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
9.40 μg/m³
0
55
155
255
425
605+
19.79 ppb
0
55
71
86
201
201+
0.38 ppb
0
36
76
186
605
1005+
6.71 ppb
0
54
101
361
1250
2050+
0.26 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Meriden, Connecticut
Meriden, Connecticut
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AQI 22
Good
3.67μg/m³
PM2.5
20.30μg/m³
PM10
19.44ppb
O3
0.45ppb
SO2
6.54ppb
NO2
0.26ppm
CO
AQI 22
Good
4.37μg/m³
PM2.5
9.81μg/m³
PM10
21.21ppb
O3
0.52ppb
SO2
5.92ppb
NO2
0.26ppm
CO
AQI 22
Good
4.19μg/m³
PM2.5
9.57μg/m³
PM10
20.07ppb
O3
0.45ppb
SO2
5.99ppb
NO2
0.28ppm
CO
AQI 22
Good
4.40μg/m³
PM2.5
11.37μg/m³
PM10
18.71ppb
O3
0.39ppb
SO2
6.48ppb
NO2
0.26ppm
CO
AQI 22
Good
4.46μg/m³
PM2.5
9.74μg/m³
PM10
19.63ppb
O3
0.38ppb
SO2
5.79ppb
NO2
0.26ppm
CO
AQI 22
Good
4.40μg/m³
PM2.5
11.37μg/m³
PM10
18.71ppb
O3
0.39ppb
SO2
6.48ppb
NO2
0.26ppm
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 05:00:00 on 2026-11-12.
In the last 24 hours, the best air quality in Meriden, Connecticut was observed at 11:00:00 on 2026-11-12.
As of now, the AQI in Meriden, Connecticut is 22, indicating Good 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 4.478 μg/m3.
The PM10 concentration in Meriden, Connecticut is 9.397 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Meriden, Connecticut is 0.259 ppm.
Currently, Meriden, Connecticut has a sulfur dioxide (SO2) concentration of 0.378 ppb.
The current ozone (O3) level in Meriden, Connecticut at the moment is 19.791 ppm.
Nitrogen dioxide (NO2) level in Meriden, Connecticut at the moment is 6.713 ppb.
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