Stay updated with real-time air quality in Longmeadow, 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)
19
Good
Longmeadow, Massachusetts
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
2.55 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
10.74 μg/m³
0
55
155
255
425
605+
20.45 ppb
0
55
71
86
201
201+
0.68 ppb
0
36
76
186
605
1005+
2.87 ppb
0
54
101
361
1250
2050+
0.24 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Longmeadow, Massachusetts
Longmeadow, Massachusetts
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AQI 19
Good
2.73μg/m³
PM2.5
11.71μg/m³
PM10
20.32ppb
O3
0.68ppb
SO2
2.84ppb
NO2
0.24ppm
CO
AQI 19
Good
3.26μg/m³
PM2.5
14.35μg/m³
PM10
20.26ppb
O3
0.69ppb
SO2
2.93ppb
NO2
0.24ppm
CO
AQI 19
Good
2.05μg/m³
PM2.5
8.25μg/m³
PM10
20.81ppb
O3
0.68ppb
SO2
2.72ppb
NO2
0.24ppm
CO
AQI 19
Good
1.45μg/m³
PM2.5
5.27μg/m³
PM10
21.05ppb
O3
0.68ppb
SO2
3.62ppb
NO2
0.25ppm
CO
AQI 19
Good
3.22μg/m³
PM2.5
14.13μg/m³
PM10
20.25ppb
O3
0.69ppb
SO2
2.90ppb
NO2
0.24ppm
CO
AQI 19
Good
2.73μg/m³
PM2.5
11.86μg/m³
PM10
20.10ppb
O3
0.69ppb
SO2
2.59ppb
NO2
0.24ppm
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 Longmeadow, Massachusetts is updated every hour.
The worst air quality in Longmeadow, Massachusetts in the last 24 hours was observed at 03:00:00 on 2026-09-28.
In the last 24 hrs, the best air quality in Longmeadow, Massachusetts was observed at 10:00:00 on 2026-09-28.
The current air quality in Longmeadow, Massachusetts is 19, categorized as Good based on real-time data.
The most common pollutant in Longmeadow, Massachusetts is O3.
If the air quality in Longmeadow, Massachusetts is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Longmeadow, Massachusetts is 2.551 μg/m3.
The current PM10 concentration at Longmeadow, Massachusetts is 10.74 μg/m3.
The current carbon monoxide (CO) concentration at Longmeadow, Massachusetts is 0.242 ppm.
The current sulfur dioxide (SO2) concentration at Longmeadow, Massachusetts is 0.683 ppb.
The current ozone (O3) concentration at Longmeadow, Massachusetts is 20.45 ppm.
The current nitrogen dioxide (NO2) concentration at Longmeadow, Massachusetts is 2.865 ppb.
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