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)
49
Good
Monroe, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
9.12 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
51.11 μg/m³
0
55
155
255
425
605+
24.03 ppb
0
55
71
86
201
201+
0.71 ppb
0
36
76
186
605
1005+
24.52 ppb
0
54
101
361
1250
2050+
0.35 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Monroe, Connecticut
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AQI 54
Moderate
10.88μg/m³
PM2.5
55.67μg/m³
PM10
23.88ppb
O3
0.69ppb
SO2
23.62ppb
NO2
0.36ppm
CO
AQI 54
Moderate
10.88μg/m³
PM2.5
55.67μg/m³
PM10
23.88ppb
O3
0.69ppb
SO2
23.62ppb
NO2
0.36ppm
CO
AQI 52
Moderate
9.71μg/m³
PM2.5
33.30μg/m³
PM10
21.58ppb
O3
0.62ppb
SO2
23.33ppb
NO2
0.37ppm
CO
AQI 54
Moderate
10.88μg/m³
PM2.5
55.67μg/m³
PM10
23.88ppb
O3
0.69ppb
SO2
23.62ppb
NO2
0.36ppm
CO
AQI 54
Moderate
11.04μg/m³
PM2.5
58.91μg/m³
PM10
29.87ppb
O3
0.78ppb
SO2
21.71ppb
NO2
0.35ppm
CO
AQI 54
Moderate
10.62μg/m³
PM2.5
55.64μg/m³
PM10
29.57ppb
O3
0.70ppb
SO2
23.43ppb
NO2
0.35ppm
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 2026-02-10.
In the last 24 hours, the best air quality in Monroe, Connecticut was observed at 01:00:00 on 2026-02-10.
As of now, the AQI in Monroe, Connecticut is 49, 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 9.119 μg/m3.
The PM10 concentration in Monroe, Connecticut is 51.107 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Monroe, Connecticut is 0.352 ppm.
Currently, Monroe, Connecticut has a sulfur dioxide (SO2) concentration of 0.714 ppb.
The current ozone (O3) level in Monroe, Connecticut at the moment is 24.032 ppm.
Nitrogen dioxide (NO2) level in Monroe, Connecticut at the moment is 24.515 ppb.
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