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)
42
Good
Grafton, Massachusetts
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.20 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
8.88 μg/m³
0
55
155
255
425
605+
44.64 ppb
0
55
71
86
201
201+
0.29 ppb
0
36
76
186
605
1005+
3.19 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 42
Good
4.18μg/m³
PM2.5
10.64μg/m³
PM10
45.09ppb
O3
0.17ppb
SO2
1.60ppb
NO2
0.20ppm
CO
AQI 42
Good
3.93μg/m³
PM2.5
8.09μg/m³
PM10
45.05ppb
O3
0.31ppb
SO2
2.98ppb
NO2
0.22ppm
CO
AQI 42
Good
4.25μg/m³
PM2.5
18.09μg/m³
PM10
44.69ppb
O3
0.31ppb
SO2
3.00ppb
NO2
0.21ppm
CO
AQI 42
Good
4.21μg/m³
PM2.5
10.68μg/m³
PM10
45.03ppb
O3
0.16ppb
SO2
1.51ppb
NO2
0.20ppm
CO
AQI 42
Good
4.39μg/m³
PM2.5
10.03μg/m³
PM10
45.08ppb
O3
0.10ppb
SO2
1.02ppb
NO2
0.20ppm
CO
AQI 42
Good
3.96μg/m³
PM2.5
11.39μg/m³
PM10
45.07ppb
O3
0.18ppb
SO2
1.69ppb
NO2
0.20ppm
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 08:00:00 on 2026-03-29.
In the last 24 hours, the best air quality in Grafton, Massachusetts was observed at 01:00:00 on 2026-03-29.
As of now, the AQI in Grafton, Massachusetts is 42, 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 4.198 μg/m3.
The PM10 concentration in Grafton, Massachusetts is 8.885 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Grafton, Massachusetts is 0.213 ppm.
Currently, Grafton, Massachusetts has a sulfur dioxide (SO2) concentration of 0.292 ppb.
The current ozone (O3) level in Grafton, Massachusetts at the moment is 44.643 ppm.
Nitrogen dioxide (NO2) level in Grafton, Massachusetts at the moment is 3.186 ppb.
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