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)
22
Good
Charlton, Massachusetts
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.24 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
20.28 μg/m³
0
55
155
255
425
605+
21.74 ppb
0
55
71
86
201
201+
0.37 ppb
0
36
76
186
605
1005+
1.89 ppb
0
54
101
361
1250
2050+
0.23 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Charlton, Massachusetts
Charlton, Massachusetts
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AQI 20
Good
3.24μg/m³
PM2.5
8.63μg/m³
PM10
22.04ppb
O3
0.40ppb
SO2
2.17ppb
NO2
0.22ppm
CO
AQI 22
Good
4.30μg/m³
PM2.5
16.80μg/m³
PM10
21.02ppb
O3
0.35ppb
SO2
2.71ppb
NO2
0.21ppm
CO
AQI 19
Good
3.15μg/m³
PM2.5
9.66μg/m³
PM10
20.96ppb
O3
0.31ppb
SO2
2.24ppb
NO2
0.22ppm
CO
AQI 19
Good
3.31μg/m³
PM2.5
8.72μg/m³
PM10
21.08ppb
O3
0.37ppb
SO2
1.90ppb
NO2
0.22ppm
CO
AQI 22
Good
4.48μg/m³
PM2.5
18.47μg/m³
PM10
20.32ppb
O3
0.29ppb
SO2
4.54ppb
NO2
0.21ppm
CO
AQI 27
Good
4.89μg/m³
PM2.5
13.42μg/m³
PM10
19.27ppb
O3
0.18ppb
SO2
5.04ppb
NO2
0.26ppm
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 01:00:00 on 2026-11-12.
In the last 24 hrs, the best air quality in Charlton, Massachusetts was observed at 01:00:00 on 2026-11-12.
The current air quality in Charlton, Massachusetts is 22, categorized as Good based on real-time data.
The most common pollutant in Charlton, Massachusetts is PM2.5.
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 4.237 μg/m3.
The current PM10 concentration at Charlton, Massachusetts is 20.278 μg/m3.
The current carbon monoxide (CO) concentration at Charlton, Massachusetts is 0.227 ppm.
The current sulfur dioxide (SO2) concentration at Charlton, Massachusetts is 0.366 ppb.
The current ozone (O3) concentration at Charlton, Massachusetts is 21.74 ppm.
The current nitrogen dioxide (NO2) concentration at Charlton, Massachusetts is 1.888 ppb.
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