Stay updated with real-time air quality in Southborough, 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)
56
Moderate
Southborough, Massachusetts
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
12.38 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
55.25 μg/m³
0
55
155
255
425
605+
37.12 ppb
0
55
71
86
201
201+
0.51 ppb
0
36
76
186
605
1005+
3.62 ppb
0
54
101
361
1250
2050+
0.16 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Southborough, Massachusetts
Southborough, Massachusetts
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AQI 56
Moderate
11.77μg/m³
PM2.5
55.20μg/m³
PM10
36.24ppb
O3
0.54ppb
SO2
3.53ppb
NO2
0.16ppm
CO
AQI 58
Moderate
12.68μg/m³
PM2.5
56.02μg/m³
PM10
37.13ppb
O3
0.60ppb
SO2
3.97ppb
NO2
0.16ppm
CO
AQI 58
Moderate
13.45μg/m³
PM2.5
43.42μg/m³
PM10
36.70ppb
O3
0.43ppb
SO2
3.63ppb
NO2
0.16ppm
CO
AQI 56
Moderate
12.40μg/m³
PM2.5
51.27μg/m³
PM10
37.71ppb
O3
0.49ppb
SO2
3.73ppb
NO2
0.16ppm
CO
AQI 58
Moderate
12.64μg/m³
PM2.5
56.48μg/m³
PM10
37.24ppb
O3
0.61ppb
SO2
3.94ppb
NO2
0.16ppm
CO
AQI 58
Moderate
13.14μg/m³
PM2.5
43.30μg/m³
PM10
35.11ppb
O3
0.39ppb
SO2
3.45ppb
NO2
0.16ppm
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 Southborough, Massachusetts is updated every hour.
The worst air quality in Southborough, Massachusetts in the last 24 hours was observed at 06:00:00 on 2026-06-29.
In the last 24 hrs, the best air quality in Southborough, Massachusetts was observed at 02:00:00 on 2026-06-29.
The current air quality in Southborough, Massachusetts is 56, categorized as Moderate based on real-time data.
The most common pollutant in Southborough, Massachusetts is PM2.5.
If the air quality in Southborough, Massachusetts is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Southborough, Massachusetts is 12.38 μg/m3.
The current PM10 concentration at Southborough, Massachusetts is 55.254 μg/m3.
The current carbon monoxide (CO) concentration at Southborough, Massachusetts is 0.161 ppm.
The current sulfur dioxide (SO2) concentration at Southborough, Massachusetts is 0.509 ppb.
The current ozone (O3) concentration at Southborough, Massachusetts is 37.121 ppm.
The current nitrogen dioxide (NO2) concentration at Southborough, Massachusetts is 3.623 ppb.
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