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)
19
Good
Charlton, Massachusetts
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
1.13 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
5.35 μg/m³
0
55
155
255
425
605+
21.28 ppb
0
55
71
86
201
201+
0.66 ppb
0
36
76
186
605
1005+
3.87 ppb
0
54
101
361
1250
2050+
0.24 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Charlton, Massachusetts
Charlton, Massachusetts
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AQI 19
Good
1.23μg/m³
PM2.5
2.97μg/m³
PM10
21.18ppb
O3
0.66ppb
SO2
3.00ppb
NO2
0.25ppm
CO
AQI 19
Good
1.10μg/m³
PM2.5
5.45μg/m³
PM10
21.43ppb
O3
0.66ppb
SO2
5.75ppb
NO2
0.24ppm
CO
AQI 19
Good
1.24μg/m³
PM2.5
4.37μg/m³
PM10
21.50ppb
O3
0.65ppb
SO2
2.98ppb
NO2
0.25ppm
CO
AQI 20
Good
1.11μg/m³
PM2.5
5.45μg/m³
PM10
21.62ppb
O3
0.65ppb
SO2
4.71ppb
NO2
0.25ppm
CO
AQI 20
Good
1.14μg/m³
PM2.5
5.38μg/m³
PM10
22.07ppb
O3
0.69ppb
SO2
2.88ppb
NO2
0.21ppm
CO
AQI 20
Good
0.97μg/m³
PM2.5
3.98μg/m³
PM10
21.79ppb
O3
0.70ppb
SO2
4.91ppb
NO2
0.21ppm
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 03:00:00 on 2026-09-28.
In the last 24 hrs, the best air quality in Charlton, Massachusetts was observed at 10:00:00 on 2026-09-28.
The current air quality in Charlton, Massachusetts is 19, 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 1.134 μg/m3.
The current PM10 concentration at Charlton, Massachusetts is 5.346 μg/m3.
The current carbon monoxide (CO) concentration at Charlton, Massachusetts is 0.244 ppm.
The current sulfur dioxide (SO2) concentration at Charlton, Massachusetts is 0.664 ppb.
The current ozone (O3) concentration at Charlton, Massachusetts is 21.278 ppm.
The current nitrogen dioxide (NO2) concentration at Charlton, Massachusetts is 3.873 ppb.
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