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
5.82 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
12.78 μg/m³
0
55
155
255
425
605+
35.50 ppb
0
55
71
86
201
201+
0.40 ppb
0
36
76
186
605
1005+
9.26 ppb
0
54
101
361
1250
2050+
0.25 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Monroe, Connecticut
Monroe, Connecticut
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AQI 33
Good
6.25μg/m³
PM2.5
13.71μg/m³
PM10
28.35ppb
O3
0.38ppb
SO2
11.72ppb
NO2
0.21ppm
CO
AQI 33
Good
6.25μg/m³
PM2.5
13.71μg/m³
PM10
28.35ppb
O3
0.38ppb
SO2
11.72ppb
NO2
0.21ppm
CO
AQI 38
Good
7.36μg/m³
PM2.5
19.53μg/m³
PM10
39.27ppb
O3
0.44ppb
SO2
8.65ppb
NO2
0.22ppm
CO
AQI 33
Good
6.25μg/m³
PM2.5
13.71μg/m³
PM10
28.35ppb
O3
0.38ppb
SO2
11.72ppb
NO2
0.21ppm
CO
AQI 27
Good
5.15μg/m³
PM2.5
14.62μg/m³
PM10
24.90ppb
O3
0.40ppb
SO2
8.47ppb
NO2
0.21ppm
CO
AQI 33
Good
6.13μg/m³
PM2.5
14.72μg/m³
PM10
30.99ppb
O3
0.37ppb
SO2
12.06ppb
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 10:00:00 on 2026-05-13.
In the last 24 hours, the best air quality in Monroe, Connecticut was observed at 01:00:00 on 2026-05-13.
As of now, the AQI in Monroe, Connecticut is 33, indicating Good conditions.
Monroe, Connecticut air has the highest levels of O3.
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 5.817 μg/m3.
The PM10 concentration in Monroe, Connecticut is 12.775 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Monroe, Connecticut is 0.247 ppm.
Currently, Monroe, Connecticut has a sulfur dioxide (SO2) concentration of 0.401 ppb.
The current ozone (O3) level in Monroe, Connecticut at the moment is 35.502 ppm.
Nitrogen dioxide (NO2) level in Monroe, Connecticut at the moment is 9.263 ppb.
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