Stay updated with real-time air quality in Middletown, 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)
22
Good
Middletown, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
2.44 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
9.95 μg/m³
0
55
155
255
425
605+
24.05 ppb
0
55
71
86
201
201+
0.16 ppb
0
36
76
186
605
1005+
4.27 ppb
0
54
101
361
1250
2050+
0.12 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Middletown, Connecticut
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AQI 21
Good
2.63μg/m³
PM2.5
9.20μg/m³
PM10
22.87ppb
O3
0.21ppb
SO2
3.93ppb
NO2
0.12ppm
CO
AQI 21
Good
2.63μg/m³
PM2.5
12.78μg/m³
PM10
23.08ppb
O3
0.21ppb
SO2
4.12ppb
NO2
0.12ppm
CO
AQI 22
Good
2.63μg/m³
PM2.5
12.75μg/m³
PM10
23.55ppb
O3
0.21ppb
SO2
3.82ppb
NO2
0.12ppm
CO
AQI 22
Good
2.66μg/m³
PM2.5
6.83μg/m³
PM10
24.17ppb
O3
0.22ppb
SO2
4.01ppb
NO2
0.13ppm
CO
AQI 24
Good
2.62μg/m³
PM2.5
9.13μg/m³
PM10
25.60ppb
O3
0.20ppb
SO2
4.29ppb
NO2
0.12ppm
CO
AQI 21
Good
2.63μg/m³
PM2.5
12.78μg/m³
PM10
23.08ppb
O3
0.21ppb
SO2
4.12ppb
NO2
0.12ppm
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 Middletown, Connecticut is updated every hour for accuracy.
In the past 24 hours, the air quality in Middletown, Connecticut was at its worst at 11:00:00 on 2026-02-11.
In the last 24 hours, the best air quality in Middletown, Connecticut was observed at 02:00:00 on 2026-02-12.
As of now, the AQI in Middletown, Connecticut is 23, indicating Good conditions.
Middletown, Connecticut air has the highest levels of O3.
Poor air quality in Middletown, Connecticut means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Middletown, Connecticut are currently 2.655 μg/m3.
The PM10 concentration in Middletown, Connecticut is 6.948 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Middletown, Connecticut is 0.123 ppm.
Currently, Middletown, Connecticut has a sulfur dioxide (SO2) concentration of 0.211 ppb.
The current ozone (O3) level in Middletown, Connecticut at the moment is 25.19 ppm.
Nitrogen dioxide (NO2) level in Middletown, Connecticut at the moment is 4.009 ppb.
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