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)
29
Good
Medford, Massachusetts
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.23 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
17.42 μg/m³
0
55
155
255
425
605+
30.66 ppb
0
55
71
86
201
201+
0.39 ppb
0
36
76
186
605
1005+
7.11 ppb
0
54
101
361
1250
2050+
0.19 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Medford, Massachusetts
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AQI 27
Good
3.53μg/m³
PM2.5
13.54μg/m³
PM10
29.44ppb
O3
0.61ppb
SO2
6.10ppb
NO2
0.20ppm
CO
AQI 24
Good
3.61μg/m³
PM2.5
14.96μg/m³
PM10
26.29ppb
O3
0.64ppb
SO2
8.33ppb
NO2
0.19ppm
CO
AQI 24
Good
3.67μg/m³
PM2.5
14.94μg/m³
PM10
25.91ppb
O3
0.62ppb
SO2
8.16ppb
NO2
0.19ppm
CO
AQI 26
Good
3.62μg/m³
PM2.5
14.87μg/m³
PM10
28.23ppb
O3
0.60ppb
SO2
7.07ppb
NO2
0.21ppm
CO
AQI 28
Good
3.52μg/m³
PM2.5
7.73μg/m³
PM10
29.99ppb
O3
0.57ppb
SO2
7.79ppb
NO2
0.20ppm
CO
AQI 28
Good
3.51μg/m³
PM2.5
12.40μg/m³
PM10
30.07ppb
O3
0.61ppb
SO2
5.40ppb
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 04:00:00 on 2026-02-11.
In the last 24 hrs, the best air quality in Medford, Massachusetts was observed at 01:00:00 on 2026-02-12.
The current air quality in Medford, Massachusetts is 29, 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 4.234 μg/m3.
The current PM10 concentration at Medford, Massachusetts is 17.419 μg/m3.
The current carbon monoxide (CO) concentration at Medford, Massachusetts is 0.193 ppm.
The current sulfur dioxide (SO2) concentration at Medford, Massachusetts is 0.39 ppb.
The current ozone (O3) concentration at Medford, Massachusetts is 30.663 ppm.
The current nitrogen dioxide (NO2) concentration at Medford, Massachusetts is 7.112 ppb.
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