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)
25
Good
Southborough, Massachusetts
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.79 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
16.33 μg/m³
0
55
155
255
425
605+
26.89 ppb
0
55
71
86
201
201+
0.49 ppb
0
36
76
186
605
1005+
3.15 ppb
0
54
101
361
1250
2050+
0.18 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Southborough, Massachusetts
Southborough, Massachusetts
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AQI 25
Good
3.76μg/m³
PM2.5
14.83μg/m³
PM10
26.95ppb
O3
0.52ppb
SO2
1.38ppb
NO2
0.14ppm
CO
AQI 23
Good
3.62μg/m³
PM2.5
15.46μg/m³
PM10
25.23ppb
O3
0.54ppb
SO2
1.60ppb
NO2
0.19ppm
CO
AQI 25
Good
3.72μg/m³
PM2.5
16.39μg/m³
PM10
27.49ppb
O3
0.42ppb
SO2
2.96ppb
NO2
0.17ppm
CO
AQI 23
Good
3.80μg/m³
PM2.5
16.35μg/m³
PM10
25.11ppb
O3
0.47ppb
SO2
3.23ppb
NO2
0.18ppm
CO
AQI 23
Good
3.62μg/m³
PM2.5
15.84μg/m³
PM10
25.09ppb
O3
0.56ppb
SO2
1.57ppb
NO2
0.19ppm
CO
AQI 26
Good
3.88μg/m³
PM2.5
18.58μg/m³
PM10
28.22ppb
O3
0.38ppb
SO2
2.48ppb
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 08:00:00 on 2026-08-13.
In the last 24 hrs, the best air quality in Southborough, Massachusetts was observed at 04:00:00 on 2026-08-14.
The current air quality in Southborough, Massachusetts is 25, categorized as Good based on real-time data.
The most common pollutant in Southborough, Massachusetts is O3.
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 3.793 μg/m3.
The current PM10 concentration at Southborough, Massachusetts is 16.333 μg/m3.
The current carbon monoxide (CO) concentration at Southborough, Massachusetts is 0.182 ppm.
The current sulfur dioxide (SO2) concentration at Southborough, Massachusetts is 0.491 ppb.
The current ozone (O3) concentration at Southborough, Massachusetts is 26.889 ppm.
The current nitrogen dioxide (NO2) concentration at Southborough, Massachusetts is 3.151 ppb.
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