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

Good
Fine
Moderate
Poor
Very poor
Hazardous
7.29 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
38.18 μg/m³
0
55
155
255
425
605+
27.16 ppb
0
55
71
86
201
201+
0.76 ppb
0
36
76
186
605
1005+
7.77 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 44
Good
8.19μg/m³
PM2.5
20.95μg/m³
PM10
19.36ppb
O3
0.67ppb
SO2
9.45ppb
NO2
0.24ppm
CO
AQI 44
Good
8.19μg/m³
PM2.5
20.95μg/m³
PM10
19.36ppb
O3
0.67ppb
SO2
9.45ppb
NO2
0.24ppm
CO
AQI 38
Good
6.72μg/m³
PM2.5
20.43μg/m³
PM10
25.63ppb
O3
0.80ppb
SO2
6.76ppb
NO2
0.26ppm
CO
AQI 44
Good
8.19μg/m³
PM2.5
20.95μg/m³
PM10
19.36ppb
O3
0.67ppb
SO2
9.45ppb
NO2
0.24ppm
CO
AQI 33
Good
6.48μg/m³
PM2.5
21.23μg/m³
PM10
18.61ppb
O3
0.74ppb
SO2
9.58ppb
NO2
0.23ppm
CO
AQI 56
Moderate
12.15μg/m³
PM2.5
41.71μg/m³
PM10
19.29ppb
O3
0.65ppb
SO2
8.79ppb
NO2
0.23ppm
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 04:00:00 on 2026-07-11.
In the last 24 hours, the best air quality in Monroe, Connecticut was observed at 12:00:00 on 2026-07-11.
As of now, the AQI in Monroe, Connecticut is 32, indicating Good conditions.
Monroe, Connecticut air has the highest levels of PM10.
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 5.256 μg/m3.
The PM10 concentration in Monroe, Connecticut is 34.682 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Monroe, Connecticut is 0.238 ppm.
Currently, Monroe, Connecticut has a sulfur dioxide (SO2) concentration of 0.74 ppb.
The current ozone (O3) level in Monroe, Connecticut at the moment is 25.435 ppm.
Nitrogen dioxide (NO2) level in Monroe, Connecticut at the moment is 8.501 ppb.
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