Stay updated with real-time air quality in Charlton, Massachusetts 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)
29
Good
Charlton, Massachusetts
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.04 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
15.21 μg/m³
0
55
155
255
425
605+
30.87 ppb
0
55
71
86
201
201+
0.24 ppb
0
36
76
186
605
1005+
2.57 ppb
0
54
101
361
1250
2050+
0.17 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Charlton, Massachusetts
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AQI 29
Good
2.82μg/m³
PM2.5
7.77μg/m³
PM10
30.66ppb
O3
0.25ppb
SO2
2.19ppb
NO2
0.18ppm
CO
AQI 30
Good
2.82μg/m³
PM2.5
9.51μg/m³
PM10
31.70ppb
O3
0.26ppb
SO2
2.17ppb
NO2
0.21ppm
CO
AQI 27
Good
2.69μg/m³
PM2.5
10.89μg/m³
PM10
29.25ppb
O3
0.25ppb
SO2
2.19ppb
NO2
0.19ppm
CO
AQI 28
Good
2.75μg/m³
PM2.5
7.97μg/m³
PM10
30.41ppb
O3
0.25ppb
SO2
2.19ppb
NO2
0.19ppm
CO
AQI 29
Good
3.09μg/m³
PM2.5
8.56μg/m³
PM10
30.68ppb
O3
0.26ppb
SO2
1.99ppb
NO2
0.20ppm
CO
AQI 28
Good
2.69μg/m³
PM2.5
6.37μg/m³
PM10
29.87ppb
O3
0.29ppb
SO2
1.98ppb
NO2
0.20ppm
CO
Air quality data and pollutant measurements for Massachusetts, USA adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.
Source: Ambee Data Sources
The air quality for Charlton, Massachusetts is updated every hour.
The worst air quality in Charlton, Massachusetts in the last 24 hours was observed at 04:00:00 on 2026-02-11.
In the last 24 hrs, the best air quality in Charlton, Massachusetts was observed at 03:00:00 on 2026-02-12.
The current air quality in Charlton, Massachusetts is 29, categorized as Good based on real-time data.
The most common pollutant in Charlton, Massachusetts is O3.
If the air quality in Charlton, Massachusetts is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Charlton, Massachusetts is 3.036 μg/m3.
The current PM10 concentration at Charlton, Massachusetts is 15.207 μg/m3.
The current carbon monoxide (CO) concentration at Charlton, Massachusetts is 0.173 ppm.
The current sulfur dioxide (SO2) concentration at Charlton, Massachusetts is 0.241 ppb.
The current ozone (O3) concentration at Charlton, Massachusetts is 30.873 ppm.
The current nitrogen dioxide (NO2) concentration at Charlton, Massachusetts is 2.57 ppb.
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