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)
43
Good
Plymouth, Connecticut
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.46 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
20.60 μg/m³
0
55
155
255
425
605+
45.51 ppb
0
55
71
86
201
201+
0.29 ppb
0
36
76
186
605
1005+
4.95 ppb
0
54
101
361
1250
2050+
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Plymouth, Connecticut
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AQI 44
Good
5.61μg/m³
PM2.5
16.38μg/m³
PM10
47.22ppb
O3
0.30ppb
SO2
5.41ppb
NO2
0.17ppm
CO
AQI 42
Good
5.98μg/m³
PM2.5
15.07μg/m³
PM10
44.87ppb
O3
0.31ppb
SO2
5.55ppb
NO2
0.18ppm
CO
AQI 42
Good
5.97μg/m³
PM2.5
15.77μg/m³
PM10
44.97ppb
O3
0.30ppb
SO2
5.71ppb
NO2
0.18ppm
CO
AQI 42
Good
6.10μg/m³
PM2.5
15.99μg/m³
PM10
44.67ppb
O3
0.31ppb
SO2
5.16ppb
NO2
0.18ppm
CO
AQI 45
Good
5.53μg/m³
PM2.5
20.15μg/m³
PM10
48.80ppb
O3
0.26ppb
SO2
5.34ppb
NO2
0.18ppm
CO
AQI 44
Good
5.58μg/m³
PM2.5
13.83μg/m³
PM10
47.88ppb
O3
0.30ppb
SO2
5.08ppb
NO2
0.17ppm
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 10:00:00, 2026-03-29.
The best air quality in Plymouth, Connecticut was observed at 01:00:00 on 2026-03-29.
The air quality in Plymouth, Connecticut right now is Good, with an AQI of 43.
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 5.455 μg/m3.
Plymouth, Connecticut currently has a PM10 concentration of 20.601 μg/m3.
The current carbon monoxide (CO) level in Plymouth, Connecticut is 0.197 ppm.
The current sulfur dioxide (SO2) concentration in Plymouth, Connecticut is 0.294 ppb.
Plymouth, Connecticut currently has an ozone (O3) concentration of 45.506 ppm.
The current level of nitrogen dioxide (NO2) in Plymouth, Connecticut is 4.95 ppb.
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