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)
31
Good
Longmeadow, Massachusetts
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.93 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
20.45 μg/m³
0
55
155
255
425
605+
32.72 ppb
0
55
71
86
201
201+
0.14 ppb
0
36
76
186
605
1005+
13.60 ppb
0
54
101
361
1250
2050+
0.23 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Longmeadow, Massachusetts
Longmeadow, Massachusetts
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AQI 31
Good
4.80μg/m³
PM2.5
19.75μg/m³
PM10
33.61ppb
O3
0.13ppb
SO2
13.96ppb
NO2
0.23ppm
CO
AQI 31
Good
4.85μg/m³
PM2.5
20.72μg/m³
PM10
32.93ppb
O3
0.10ppb
SO2
15.45ppb
NO2
0.22ppm
CO
AQI 32
Good
4.36μg/m³
PM2.5
17.20μg/m³
PM10
35.30ppb
O3
0.17ppb
SO2
10.96ppb
NO2
0.23ppm
CO
AQI 31
Good
5.24μg/m³
PM2.5
14.57μg/m³
PM10
33.82ppb
O3
0.19ppb
SO2
11.03ppb
NO2
0.24ppm
CO
AQI 31
Good
4.83μg/m³
PM2.5
20.64μg/m³
PM10
32.97ppb
O3
0.11ppb
SO2
15.25ppb
NO2
0.22ppm
CO
AQI 31
Good
4.64μg/m³
PM2.5
19.83μg/m³
PM10
33.44ppb
O3
0.12ppb
SO2
13.20ppb
NO2
0.22ppm
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 04:00:00 on 2026-05-13.
In the last 24 hrs, the best air quality in Longmeadow, Massachusetts was observed at 03:00:00 on 2026-05-13.
The current air quality in Longmeadow, Massachusetts is 31, 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 4.927 μg/m3.
The current PM10 concentration at Longmeadow, Massachusetts is 20.445 μg/m3.
The current carbon monoxide (CO) concentration at Longmeadow, Massachusetts is 0.23 ppm.
The current sulfur dioxide (SO2) concentration at Longmeadow, Massachusetts is 0.136 ppb.
The current ozone (O3) concentration at Longmeadow, Massachusetts is 32.72 ppm.
The current nitrogen dioxide (NO2) concentration at Longmeadow, Massachusetts is 13.604 ppb.
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