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)
44
Good
Charlton, Massachusetts
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.51 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
14.41 μg/m³
0
55
155
255
425
605+
46.75 ppb
0
55
71
86
201
201+
0.23 ppb
0
36
76
186
605
1005+
3.69 ppb
0
54
101
361
1250
2050+
0.19 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Charlton, Massachusetts
Charlton, Massachusetts
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AQI 44
Good
5.36μg/m³
PM2.5
22.58μg/m³
PM10
47.91ppb
O3
0.21ppb
SO2
3.09ppb
NO2
0.19ppm
CO
AQI 39
Good
5.31μg/m³
PM2.5
12.78μg/m³
PM10
41.82ppb
O3
0.20ppb
SO2
3.43ppb
NO2
0.23ppm
CO
AQI 44
Good
5.32μg/m³
PM2.5
22.28μg/m³
PM10
47.94ppb
O3
0.20ppb
SO2
3.28ppb
NO2
0.23ppm
CO
AQI 44
Good
5.30μg/m³
PM2.5
13.02μg/m³
PM10
47.63ppb
O3
0.20ppb
SO2
3.46ppb
NO2
0.23ppm
CO
AQI 39
Good
5.29μg/m³
PM2.5
19.55μg/m³
PM10
42.12ppb
O3
0.21ppb
SO2
2.06ppb
NO2
0.19ppm
CO
AQI 40
Good
5.02μg/m³
PM2.5
11.88μg/m³
PM10
42.67ppb
O3
0.21ppb
SO2
2.92ppb
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 09:00:00 on 2026-06-10.
In the last 24 hrs, the best air quality in Charlton, Massachusetts was observed at 06:00:00 on 2026-06-11.
The current air quality in Charlton, Massachusetts is 44, 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 4.507 μg/m3.
The current PM10 concentration at Charlton, Massachusetts is 14.413 μg/m3.
The current carbon monoxide (CO) concentration at Charlton, Massachusetts is 0.193 ppm.
The current sulfur dioxide (SO2) concentration at Charlton, Massachusetts is 0.225 ppb.
The current ozone (O3) concentration at Charlton, Massachusetts is 46.75 ppm.
The current nitrogen dioxide (NO2) concentration at Charlton, Massachusetts is 3.69 ppb.
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