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)
25
Good
Monroe, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
2.73 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
10.77 μg/m³
0
55
155
255
425
605+
26.89 ppb
0
55
71
86
201
201+
0.16 ppb
0
36
76
186
605
1005+
3.82 ppb
0
54
101
361
1250
2050+
0.13 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Monroe, Connecticut
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AQI 23
Good
2.50μg/m³
PM2.5
12.78μg/m³
PM10
25.44ppb
O3
0.21ppb
SO2
6.10ppb
NO2
0.13ppm
CO
AQI 23
Good
2.50μg/m³
PM2.5
12.78μg/m³
PM10
25.44ppb
O3
0.21ppb
SO2
6.10ppb
NO2
0.13ppm
CO
AQI 23
Good
2.29μg/m³
PM2.5
5.20μg/m³
PM10
24.75ppb
O3
0.21ppb
SO2
5.03ppb
NO2
0.15ppm
CO
AQI 23
Good
2.50μg/m³
PM2.5
12.78μg/m³
PM10
25.44ppb
O3
0.21ppb
SO2
6.10ppb
NO2
0.13ppm
CO
AQI 21
Good
2.56μg/m³
PM2.5
10.65μg/m³
PM10
22.53ppb
O3
0.21ppb
SO2
4.83ppb
NO2
0.15ppm
CO
AQI 24
Good
2.70μg/m³
PM2.5
16.84μg/m³
PM10
25.98ppb
O3
0.21ppb
SO2
5.47ppb
NO2
0.13ppm
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 03:00:00 on 2026-02-11.
In the last 24 hours, the best air quality in Monroe, Connecticut was observed at 04:00:00 on 2026-02-12.
As of now, the AQI in Monroe, Connecticut is 25, 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 2.729 μg/m3.
The PM10 concentration in Monroe, Connecticut is 10.766 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Monroe, Connecticut is 0.127 ppm.
Currently, Monroe, Connecticut has a sulfur dioxide (SO2) concentration of 0.158 ppb.
The current ozone (O3) level in Monroe, Connecticut at the moment is 26.89 ppm.
Nitrogen dioxide (NO2) level in Monroe, Connecticut at the moment is 3.821 ppb.
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