Stay updated with real-time air quality in Monroe, 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)
33
Good
Monroe, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
6.24 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
11.07 μg/m³
0
55
155
255
425
605+
25.71 ppb
0
55
71
86
201
201+
0.25 ppb
0
36
76
186
605
1005+
5.49 ppb
0
54
101
361
1250
2050+
0.21 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Monroe, Connecticut
Monroe, Connecticut
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AQI 27
Good
4.82μg/m³
PM2.5
15.83μg/m³
PM10
24.92ppb
O3
0.24ppb
SO2
6.33ppb
NO2
0.21ppm
CO
AQI 27
Good
4.82μg/m³
PM2.5
15.83μg/m³
PM10
24.92ppb
O3
0.24ppb
SO2
6.33ppb
NO2
0.21ppm
CO
AQI 44
Good
7.72μg/m³
PM2.5
19.01μg/m³
PM10
27.71ppb
O3
0.22ppb
SO2
5.03ppb
NO2
0.21ppm
CO
AQI 27
Good
4.82μg/m³
PM2.5
15.83μg/m³
PM10
24.92ppb
O3
0.24ppb
SO2
6.33ppb
NO2
0.21ppm
CO
AQI 38
Good
6.74μg/m³
PM2.5
12.15μg/m³
PM10
26.66ppb
O3
0.26ppb
SO2
5.35ppb
NO2
0.21ppm
CO
AQI 27
Good
5.38μg/m³
PM2.5
16.93μg/m³
PM10
24.88ppb
O3
0.24ppb
SO2
6.19ppb
NO2
0.21ppm
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 Monroe, Connecticut is updated every hour for accuracy.
In the past 24 hours, the air quality in Monroe, Connecticut was at its worst at 12:00:00 on 2026-08-14.
In the last 24 hours, the best air quality in Monroe, Connecticut was observed at 05:00:00 on 2026-08-14.
As of now, the AQI in Monroe, Connecticut is 33, indicating Good conditions.
Monroe, Connecticut air has the highest levels of PM2.5.
Poor air quality in Monroe, Connecticut means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Monroe, Connecticut are currently 6.244 μg/m3.
The PM10 concentration in Monroe, Connecticut is 11.067 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Monroe, Connecticut is 0.212 ppm.
Currently, Monroe, Connecticut has a sulfur dioxide (SO2) concentration of 0.249 ppb.
The current ozone (O3) level in Monroe, Connecticut at the moment is 25.711 ppm.
Nitrogen dioxide (NO2) level in Monroe, Connecticut at the moment is 5.485 ppb.
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