Stay updated with real-time air quality in Grafton, 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)
27
Good
Grafton, Massachusetts
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.03 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
14.66 μg/m³
0
55
155
255
425
605+
29.44 ppb
0
55
71
86
201
201+
0.28 ppb
0
36
76
186
605
1005+
3.65 ppb
0
54
101
361
1250
2050+
0.21 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Grafton, Massachusetts
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AQI 27
Good
1.82μg/m³
PM2.5
7.02μg/m³
PM10
29.10ppb
O3
0.38ppb
SO2
5.22ppb
NO2
0.21ppm
CO
AQI 26
Good
1.34μg/m³
PM2.5
3.09μg/m³
PM10
28.18ppb
O3
0.35ppb
SO2
4.60ppb
NO2
0.23ppm
CO
AQI 27
Good
1.49μg/m³
PM2.5
4.52μg/m³
PM10
28.52ppb
O3
0.34ppb
SO2
4.32ppb
NO2
0.23ppm
CO
AQI 27
Good
1.84μg/m³
PM2.5
7.24μg/m³
PM10
29.14ppb
O3
0.39ppb
SO2
5.29ppb
NO2
0.21ppm
CO
AQI 27
Good
1.90μg/m³
PM2.5
7.98μg/m³
PM10
29.39ppb
O3
0.40ppb
SO2
5.97ppb
NO2
0.20ppm
CO
AQI 27
Good
1.89μg/m³
PM2.5
7.24μg/m³
PM10
29.12ppb
O3
0.38ppb
SO2
4.70ppb
NO2
0.21ppm
CO
Air quality and pollutant data for Massachusetts, USA are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.
Source: Ambee Data Sources
The air quality information for Grafton, Massachusetts is updated every hour for accuracy.
In the past 24 hours, the air quality in Grafton, Massachusetts was at its worst at 03:00:00 on 2026-02-11.
In the last 24 hours, the best air quality in Grafton, Massachusetts was observed at 01:00:00 on 2026-02-12.
As of now, the AQI in Grafton, Massachusetts is 27, indicating Good conditions.
Grafton, Massachusetts air has the highest levels of O3.
Poor air quality in Grafton, Massachusetts means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Grafton, Massachusetts are currently 1.833 μg/m3.
The PM10 concentration in Grafton, Massachusetts is 5.999 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Grafton, Massachusetts is 0.223 ppm.
Currently, Grafton, Massachusetts has a sulfur dioxide (SO2) concentration of 0.331 ppb.
The current ozone (O3) level in Grafton, Massachusetts at the moment is 28.749 ppm.
Nitrogen dioxide (NO2) level in Grafton, Massachusetts at the moment is 4.524 ppb.
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