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)
30
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+
11.62 μg/m³
0
55
155
255
425
605+
32.10 ppb
0
55
71
86
201
201+
0.16 ppb
0
36
76
186
605
1005+
3.92 ppb
0
54
101
361
1250
2050+
0.12 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Plymouth, Connecticut
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AQI 27
Good
3.05μg/m³
PM2.5
7.04μg/m³
PM10
28.76ppb
O3
0.16ppb
SO2
3.19ppb
NO2
0.12ppm
CO
AQI 26
Good
3.04μg/m³
PM2.5
6.57μg/m³
PM10
28.45ppb
O3
0.16ppb
SO2
3.28ppb
NO2
0.12ppm
CO
AQI 26
Good
3.14μg/m³
PM2.5
6.82μg/m³
PM10
28.37ppb
O3
0.16ppb
SO2
3.24ppb
NO2
0.11ppm
CO
AQI 26
Good
3.10μg/m³
PM2.5
6.99μg/m³
PM10
28.12ppb
O3
0.16ppb
SO2
3.25ppb
NO2
0.12ppm
CO
AQI 31
Good
2.93μg/m³
PM2.5
9.75μg/m³
PM10
33.65ppb
O3
0.18ppb
SO2
2.99ppb
NO2
0.12ppm
CO
AQI 26
Good
3.06μg/m³
PM2.5
6.80μg/m³
PM10
28.41ppb
O3
0.16ppb
SO2
2.88ppb
NO2
0.12ppm
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, 2026-02-11.
The best air quality in Plymouth, Connecticut was observed at 03:00:00 on 2026-02-12.
The air quality in Plymouth, Connecticut right now is Good, with an AQI of 29.
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 2.965 μg/m3.
Plymouth, Connecticut currently has a PM10 concentration of 10.964 μg/m3.
The current carbon monoxide (CO) level in Plymouth, Connecticut is 0.129 ppm.
The current sulfur dioxide (SO2) concentration in Plymouth, Connecticut is 0.221 ppb.
Plymouth, Connecticut currently has an ozone (O3) concentration of 31.304 ppm.
The current level of nitrogen dioxide (NO2) in Plymouth, Connecticut is 2.928 ppb.
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