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)
40
Good
Plymouth, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.01 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
12.22 μg/m³
0
55
155
255
425
605+
42.65 ppb
0
55
71
86
201
201+
0.26 ppb
0
36
76
186
605
1005+
7.92 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
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AQI 27
Good
4.86μg/m³
PM2.5
14.79μg/m³
PM10
29.25ppb
O3
0.28ppb
SO2
6.59ppb
NO2
0.23ppm
CO
AQI 34
Good
4.75μg/m³
PM2.5
18.84μg/m³
PM10
37.23ppb
O3
0.31ppb
SO2
6.04ppb
NO2
0.23ppm
CO
AQI 34
Good
4.77μg/m³
PM2.5
19.58μg/m³
PM10
37.35ppb
O3
0.29ppb
SO2
6.54ppb
NO2
0.24ppm
CO
AQI 35
Good
4.80μg/m³
PM2.5
20.97μg/m³
PM10
37.61ppb
O3
0.30ppb
SO2
6.22ppb
NO2
0.24ppm
CO
AQI 28
Good
4.81μg/m³
PM2.5
15.01μg/m³
PM10
30.44ppb
O3
0.29ppb
SO2
5.78ppb
NO2
0.21ppm
CO
AQI 27
Good
4.91μg/m³
PM2.5
14.73μg/m³
PM10
29.46ppb
O3
0.21ppb
SO2
6.70ppb
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 11:00:00, 2026-08-09.
The best air quality in Plymouth, Connecticut was observed at 03:00:00 on 2026-08-10.
The air quality in Plymouth, Connecticut right now is Good, with an AQI of 28.
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 4.582 μg/m3.
Plymouth, Connecticut currently has a PM10 concentration of 14.592 μg/m3.
The current carbon monoxide (CO) level in Plymouth, Connecticut is 0.241 ppm.
The current sulfur dioxide (SO2) concentration in Plymouth, Connecticut is 0.293 ppb.
Plymouth, Connecticut currently has an ozone (O3) concentration of 29.745 ppm.
The current level of nitrogen dioxide (NO2) in Plymouth, Connecticut is 6.288 ppb.
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