Stay updated with real-time air quality in Old Saybrook, 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)
27
Good
Old Saybrook, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
2.40 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
10.86 μg/m³
0
55
155
255
425
605+
29.09 ppb
0
55
71
86
201
201+
0.16 ppb
0
36
76
186
605
1005+
3.09 ppb
0
54
101
361
1250
2050+
0.13 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Old Saybrook, Connecticut
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AQI 19
Good
2.18μg/m³
PM2.5
8.86μg/m³
PM10
20.44ppb
O3
0.21ppb
SO2
4.01ppb
NO2
0.14ppm
CO
AQI 21
Good
2.55μg/m³
PM2.5
9.80μg/m³
PM10
23.35ppb
O3
0.20ppb
SO2
3.50ppb
NO2
0.15ppm
CO
AQI 21
Good
2.18μg/m³
PM2.5
9.07μg/m³
PM10
23.21ppb
O3
0.21ppb
SO2
4.87ppb
NO2
0.13ppm
CO
AQI 20
Good
2.15μg/m³
PM2.5
4.32μg/m³
PM10
21.51ppb
O3
0.27ppb
SO2
2.92ppb
NO2
0.16ppm
CO
AQI 19
Good
2.10μg/m³
PM2.5
4.03μg/m³
PM10
21.16ppb
O3
0.27ppb
SO2
2.93ppb
NO2
0.16ppm
CO
AQI 22
Good
2.43μg/m³
PM2.5
8.22μg/m³
PM10
23.61ppb
O3
0.21ppb
SO2
6.66ppb
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 Old Saybrook, Connecticut is updated every hour for accuracy.
In the past 24 hours, the air quality in Old Saybrook, Connecticut was at its worst at 12:00:00 on 2026-02-11.
In the last 24 hours, the best air quality in Old Saybrook, Connecticut was observed at 04:00:00 on 2026-02-12.
As of now, the AQI in Old Saybrook, Connecticut is 27, indicating Good conditions.
Old Saybrook, Connecticut air has the highest levels of O3.
Poor air quality in Old Saybrook, Connecticut means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Old Saybrook, Connecticut are currently 2.403 μg/m3.
The PM10 concentration in Old Saybrook, Connecticut is 10.86 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Old Saybrook, Connecticut is 0.126 ppm.
Currently, Old Saybrook, Connecticut has a sulfur dioxide (SO2) concentration of 0.164 ppb.
The current ozone (O3) level in Old Saybrook, Connecticut at the moment is 29.091 ppm.
Nitrogen dioxide (NO2) level in Old Saybrook, Connecticut at the moment is 3.086 ppb.
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