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

Good
Fine
Moderate
Poor
Very poor
Hazardous
7.83 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
32.26 μg/m³
0
55
155
255
425
605+
46.52 ppb
0
55
71
86
201
201+
0.58 ppb
0
36
76
186
605
1005+
5.21 ppb
0
54
101
361
1250
2050+
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Medford, Massachusetts
Medford, Massachusetts
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AQI 49
Good
8.75μg/m³
PM2.5
33.44μg/m³
PM10
51.28ppb
O3
0.65ppb
SO2
4.29ppb
NO2
0.20ppm
CO
AQI 44
Good
7.46μg/m³
PM2.5
30.81μg/m³
PM10
46.93ppb
O3
0.69ppb
SO2
5.17ppb
NO2
0.19ppm
CO
AQI 44
Good
7.70μg/m³
PM2.5
31.28μg/m³
PM10
46.22ppb
O3
0.58ppb
SO2
5.26ppb
NO2
0.19ppm
CO
AQI 49
Good
8.67μg/m³
PM2.5
35.12μg/m³
PM10
49.22ppb
O3
0.60ppb
SO2
4.71ppb
NO2
0.21ppm
CO
AQI 44
Good
8.09μg/m³
PM2.5
30.25μg/m³
PM10
41.22ppb
O3
0.66ppb
SO2
4.43ppb
NO2
0.18ppm
CO
AQI 49
Good
8.86μg/m³
PM2.5
31.63μg/m³
PM10
52.49ppb
O3
0.64ppb
SO2
4.00ppb
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 Medford, Massachusetts is updated every hour.
The worst air quality in Medford, Massachusetts in the last 24 hours was observed at 02:00:00 on 2026-06-11.
In the last 24 hrs, the best air quality in Medford, Massachusetts was observed at 09:00:00 on 2026-06-11.
The current air quality in Medford, Massachusetts is 44, categorized as Good based on real-time data.
The most common pollutant in Medford, Massachusetts is O3.
If the air quality in Medford, Massachusetts is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Medford, Massachusetts is 7.828 μg/m3.
The current PM10 concentration at Medford, Massachusetts is 32.257 μg/m3.
The current carbon monoxide (CO) concentration at Medford, Massachusetts is 0.195 ppm.
The current sulfur dioxide (SO2) concentration at Medford, Massachusetts is 0.584 ppb.
The current ozone (O3) concentration at Medford, Massachusetts is 46.522 ppm.
The current nitrogen dioxide (NO2) concentration at Medford, Massachusetts is 5.213 ppb.
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