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)
38
Good
Meriden, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
7.45 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
20.45 μg/m³
0
55
155
255
425
605+
27.46 ppb
0
55
71
86
201
201+
0.21 ppb
0
36
76
186
605
1005+
14.07 ppb
0
54
101
361
1250
2050+
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Meriden, Connecticut
Meriden, Connecticut
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AQI 52
Moderate
9.58μg/m³
PM2.5
25.25μg/m³
PM10
3.98ppb
O3
0.68ppb
SO2
25.12ppb
NO2
0.36ppm
CO
AQI 49
Good
8.98μg/m³
PM2.5
39.81μg/m³
PM10
13.94ppb
O3
0.69ppb
SO2
19.60ppb
NO2
0.33ppm
CO
AQI 38
Good
7.39μg/m³
PM2.5
35.13μg/m³
PM10
4.53ppb
O3
0.69ppb
SO2
19.08ppb
NO2
0.32ppm
CO
AQI 52
Moderate
9.57μg/m³
PM2.5
31.32μg/m³
PM10
3.93ppb
O3
0.69ppb
SO2
25.90ppb
NO2
0.44ppm
CO
AQI 49
Good
9.03μg/m³
PM2.5
38.60μg/m³
PM10
16.86ppb
O3
0.67ppb
SO2
18.23ppb
NO2
0.44ppm
CO
AQI 52
Moderate
9.57μg/m³
PM2.5
31.32μg/m³
PM10
3.93ppb
O3
0.69ppb
SO2
25.90ppb
NO2
0.44ppm
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 09:00:00 on 2025-11-03.
In the last 24 hours, the best air quality in Meriden, Connecticut was observed at 05:00:00 on 2025-11-02.
As of now, the AQI in Meriden, Connecticut is 38, 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 6.706 μg/m3.
The PM10 concentration in Meriden, Connecticut is 36.023 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Meriden, Connecticut is 0.466 ppm.
Currently, Meriden, Connecticut has a sulfur dioxide (SO2) concentration of 0.851 ppb.
The current ozone (O3) level in Meriden, Connecticut at the moment is 12.207 ppm.
Nitrogen dioxide (NO2) level in Meriden, Connecticut at the moment is 21.667 ppb.
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