Stay updated with real-time air quality in Plymouth, 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)
19
Good
Plymouth, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.13 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
14.09 μg/m³
0
55
155
255
425
605+
21.31 ppb
0
55
71
86
201
201+
0.46 ppb
0
36
76
186
605
1005+
6.36 ppb
0
54
101
361
1250
2050+
0.27 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Plymouth, Connecticut
Plymouth, Connecticut
Scroll To Air Quality MapLoading...
AQI 22
Good
4.12μg/m³
PM2.5
16.25μg/m³
PM10
19.75ppb
O3
0.45ppb
SO2
6.64ppb
NO2
0.28ppm
CO
AQI 27
Good
4.64μg/m³
PM2.5
7.78μg/m³
PM10
19.98ppb
O3
0.47ppb
SO2
6.12ppb
NO2
0.27ppm
CO
AQI 27
Good
4.74μg/m³
PM2.5
7.93μg/m³
PM10
19.39ppb
O3
0.46ppb
SO2
6.19ppb
NO2
0.28ppm
CO
AQI 27
Good
4.80μg/m³
PM2.5
8.00μg/m³
PM10
19.63ppb
O3
0.46ppb
SO2
6.04ppb
NO2
0.28ppm
CO
AQI 22
Good
3.71μg/m³
PM2.5
17.39μg/m³
PM10
19.68ppb
O3
0.46ppb
SO2
6.06ppb
NO2
0.25ppm
CO
AQI 22
Good
4.37μg/m³
PM2.5
12.15μg/m³
PM10
21.42ppb
O3
0.44ppb
SO2
6.57ppb
NO2
0.26ppm
CO
The air quality data for Connecticut, USA is gathered from reliable sources such as satellites and monitoring stations, adhering to US EPA guidelines. With the help of advanced algorithms and machine learning, factors like traffic and population density are analyzed to deliver accurate and dependable results.
Source: Ambee Data Sources
Air quality updates for Plymouth, Connecticut are available every hour.
Plymouth, Connecticut experienced its worst air quality at 03:00:00, 2026-11-12.
The best air quality in Plymouth, Connecticut was observed at 06:00:00 on 2026-11-12.
The air quality in Plymouth, Connecticut right now is Good, with an AQI of 19.
In Plymouth, Connecticut, O3 is the most frequently found pollutant.
When air quality in Plymouth, Connecticut is compromised, staying indoors and wearing a mask can reduce health risks.
Plymouth, Connecticut currently has a PM2.5 concentration of 3.133 μg/m3.
Plymouth, Connecticut currently has a PM10 concentration of 14.086 μg/m3.
The current carbon monoxide (CO) level in Plymouth, Connecticut is 0.269 ppm.
The current sulfur dioxide (SO2) concentration in Plymouth, Connecticut is 0.456 ppb.
Plymouth, Connecticut currently has an ozone (O3) concentration of 21.308 ppm.
The current level of nitrogen dioxide (NO2) in Plymouth, Connecticut is 6.36 ppb.
All Rights Reserved © Ambee Inc. 2025