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)
101
Unhealthy for sensitive groups
Monroe, Connecticut
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
20.40 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
41.42 μg/m³
0
55
155
255
425
605+
71.13 ppb
0
55
71
86
201
201+
0.42 ppb
0
36
76
186
605
1005+
6.42 ppb
0
54
101
361
1250
2050+
0.32 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Monroe, Connecticut
Monroe, Connecticut
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AQI 87
Moderate
20.44μg/m³
PM2.5
36.42μg/m³
PM10
66.17ppb
O3
0.36ppb
SO2
7.91ppb
NO2
0.32ppm
CO
AQI 87
Moderate
20.44μg/m³
PM2.5
36.42μg/m³
PM10
66.17ppb
O3
0.36ppb
SO2
7.91ppb
NO2
0.32ppm
CO
AQI 93
Moderate
18.59μg/m³
PM2.5
45.63μg/m³
PM10
68.42ppb
O3
0.35ppb
SO2
5.83ppb
NO2
0.34ppm
CO
AQI 87
Moderate
20.44μg/m³
PM2.5
36.42μg/m³
PM10
66.17ppb
O3
0.36ppb
SO2
7.91ppb
NO2
0.32ppm
CO
AQI 101
Unhealthy for sensitive groups
19.93μg/m³
PM2.5
58.44μg/m³
PM10
71.05ppb
O3
0.46ppb
SO2
6.34ppb
NO2
0.32ppm
CO
AQI 87
Moderate
20.09μg/m³
PM2.5
46.35μg/m³
PM10
66.24ppb
O3
0.37ppb
SO2
8.07ppb
NO2
0.31ppm
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 2025-06-06.
In the last 24 hours, the best air quality in Monroe, Connecticut was observed at 05:00:00 on 2025-06-06.
As of now, the AQI in Monroe, Connecticut is 101, indicating Unhealthy for Sensitive Groups 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 20.399 μg/m3.
The PM10 concentration in Monroe, Connecticut is 41.418 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Monroe, Connecticut is 0.322 ppm.
Currently, Monroe, Connecticut has a sulfur dioxide (SO2) concentration of 0.425 ppb.
The current ozone (O3) level in Monroe, Connecticut at the moment is 71.125 ppm.
Nitrogen dioxide (NO2) level in Monroe, Connecticut at the moment is 6.423 ppb.
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