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

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.90 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
21.00 μg/m³
0
55
155
255
425
605+
22.01 ppb
0
55
71
86
201
201+
0.29 ppb
0
36
76
186
605
1005+
5.14 ppb
0
54
101
361
1250
2050+
0.16 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Greenfield, Massachusetts
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AQI 56
Moderate
12.21μg/m³
PM2.5
29.28μg/m³
PM10
3.64ppb
O3
0.28ppb
SO2
12.34ppb
NO2
0.34ppm
CO
AQI 52
Moderate
9.79μg/m³
PM2.5
37.16μg/m³
PM10
3.73ppb
O3
0.28ppb
SO2
16.69ppb
NO2
0.34ppm
CO
AQI 44
Good
8.00μg/m³
PM2.5
29.81μg/m³
PM10
5.28ppb
O3
0.34ppb
SO2
13.95ppb
NO2
0.45ppm
CO
AQI 38
Good
7.21μg/m³
PM2.5
27.47μg/m³
PM10
11.61ppb
O3
0.30ppb
SO2
15.79ppb
NO2
0.50ppm
CO
AQI 58
Moderate
13.17μg/m³
PM2.5
28.77μg/m³
PM10
2.41ppb
O3
0.28ppb
SO2
16.47ppb
NO2
0.44ppm
CO
AQI 49
Good
8.73μg/m³
PM2.5
37.61μg/m³
PM10
5.03ppb
O3
0.28ppb
SO2
7.60ppb
NO2
0.46ppm
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 Greenfield, Massachusetts is updated every hour.
The worst air quality in Greenfield, Massachusetts in the last 24 hours was observed at 04:00:00 on 2025-11-03.
In the last 24 hrs, the best air quality in Greenfield, Massachusetts was observed at 05:00:00 on 2025-11-02.
The current air quality in Greenfield, Massachusetts is 38, categorized as Good based on real-time data.
The most common pollutant in Greenfield, Massachusetts is PM2.5.
If the air quality in Greenfield, Massachusetts is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Greenfield, Massachusetts is 6.601 μg/m3.
The current PM10 concentration at Greenfield, Massachusetts is 30.002 μg/m3.
The current carbon monoxide (CO) concentration at Greenfield, Massachusetts is 0.329 ppm.
The current sulfur dioxide (SO2) concentration at Greenfield, Massachusetts is 0.253 ppb.
The current ozone (O3) concentration at Greenfield, Massachusetts is 8.788 ppm.
The current nitrogen dioxide (NO2) concentration at Greenfield, Massachusetts is 15.98 ppb.
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