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)
27
Good
Plymouth, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.56 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
15.19 μg/m³
0
55
155
255
425
605+
27.70 ppb
0
55
71
86
201
201+
0.13 ppb
0
36
76
186
605
1005+
6.76 ppb
0
54
101
361
1250
2050+
0.15 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 31
Good
4.85μg/m³
PM2.5
13.69μg/m³
PM10
32.56ppb
O3
0.16ppb
SO2
8.94ppb
NO2
0.25ppm
CO
AQI 30
Good
4.74μg/m³
PM2.5
13.46μg/m³
PM10
32.18ppb
O3
0.16ppb
SO2
9.14ppb
NO2
0.23ppm
CO
AQI 30
Good
4.80μg/m³
PM2.5
13.80μg/m³
PM10
31.92ppb
O3
0.16ppb
SO2
9.32ppb
NO2
0.24ppm
CO
AQI 30
Good
4.80μg/m³
PM2.5
14.00μg/m³
PM10
32.34ppb
O3
0.16ppb
SO2
8.91ppb
NO2
0.24ppm
CO
AQI 33
Good
5.69μg/m³
PM2.5
24.19μg/m³
PM10
33.38ppb
O3
0.13ppb
SO2
7.96ppb
NO2
0.19ppm
CO
AQI 29
Good
4.82μg/m³
PM2.5
12.77μg/m³
PM10
31.25ppb
O3
0.16ppb
SO2
9.30ppb
NO2
0.23ppm
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, 2025-11-03.
The best air quality in Plymouth, Connecticut was observed at 09:00:00 on 2025-11-03.
The air quality in Plymouth, Connecticut right now is Good, with an AQI of 31.
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 4.724 μg/m3.
Plymouth, Connecticut currently has a PM10 concentration of 13.276 μg/m3.
The current carbon monoxide (CO) level in Plymouth, Connecticut is 0.228 ppm.
The current sulfur dioxide (SO2) concentration in Plymouth, Connecticut is 0.15 ppb.
Plymouth, Connecticut currently has an ozone (O3) concentration of 33.152 ppm.
The current level of nitrogen dioxide (NO2) in Plymouth, Connecticut is 8.872 ppb.
All Rights Reserved © Ambee Inc. 2025