Stay updated with real-time air quality in Lower Merion, Pennsylvania 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)
44
Good
Lower Merion, Pennsylvania
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
8.19 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
36.50 μg/m³
0
55
155
255
425
605+
19.99 ppb
0
55
71
86
201
201+
0.69 ppb
0
36
76
186
605
1005+
5.49 ppb
0
54
101
361
1250
2050+
0.39 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Lower Merion, Pennsylvania
Lower Merion, Pennsylvania
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AQI 38
Good
6.89μg/m³
PM2.5
25.85μg/m³
PM10
18.50ppb
O3
0.68ppb
SO2
7.71ppb
NO2
0.36ppm
CO
AQI 33
Good
5.92μg/m³
PM2.5
26.41μg/m³
PM10
21.47ppb
O3
0.69ppb
SO2
5.49ppb
NO2
0.37ppm
CO
AQI 44
Good
7.65μg/m³
PM2.5
34.29μg/m³
PM10
20.64ppb
O3
0.68ppb
SO2
5.91ppb
NO2
0.37ppm
CO
AQI 38
Good
6.83μg/m³
PM2.5
25.93μg/m³
PM10
17.56ppb
O3
0.67ppb
SO2
7.67ppb
NO2
0.36ppm
CO
AQI 27
Good
4.61μg/m³
PM2.5
20.50μg/m³
PM10
21.97ppb
O3
0.69ppb
SO2
5.29ppb
NO2
0.37ppm
CO
AQI 44
Good
7.72μg/m³
PM2.5
33.22μg/m³
PM10
17.75ppb
O3
0.69ppb
SO2
6.12ppb
NO2
0.35ppm
CO
Air quality data and pollutant measurements for Pennsylvania, 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 Lower Merion, Pennsylvania is updated every hour.
The worst air quality in Lower Merion, Pennsylvania in the last 24 hours was observed at 11:00:00 on 2026-08-15.
In the last 24 hrs, the best air quality in Lower Merion, Pennsylvania was observed at 04:00:00 on 2026-08-15.
The current air quality in Lower Merion, Pennsylvania is 44, categorized as Good based on real-time data.
The most common pollutant in Lower Merion, Pennsylvania is PM2.5.
If the air quality in Lower Merion, Pennsylvania is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Lower Merion, Pennsylvania is 8.189 μg/m3.
The current PM10 concentration at Lower Merion, Pennsylvania is 36.503 μg/m3.
The current carbon monoxide (CO) concentration at Lower Merion, Pennsylvania is 0.389 ppm.
The current sulfur dioxide (SO2) concentration at Lower Merion, Pennsylvania is 0.69 ppb.
The current ozone (O3) concentration at Lower Merion, Pennsylvania is 19.993 ppm.
The current nitrogen dioxide (NO2) concentration at Lower Merion, Pennsylvania is 5.488 ppb.
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