Stay updated with real-time air quality in Radnor, 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)
49
Good
Radnor, Pennsylvania
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
8.58 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
38.43 μg/m³
0
55
155
255
425
605+
52.15 ppb
0
55
71
86
201
201+
0.49 ppb
0
36
76
186
605
1005+
5.06 ppb
0
54
101
361
1250
2050+
0.32 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Radnor, Pennsylvania
Radnor, Pennsylvania
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AQI 49
Good
7.89μg/m³
PM2.5
35.36μg/m³
PM10
52.83ppb
O3
0.51ppb
SO2
5.23ppb
NO2
0.31ppm
CO
AQI 49
Good
8.90μg/m³
PM2.5
36.60μg/m³
PM10
47.15ppb
O3
0.51ppb
SO2
5.00ppb
NO2
0.31ppm
CO
AQI 54
Moderate
11.47μg/m³
PM2.5
51.39μg/m³
PM10
48.74ppb
O3
0.49ppb
SO2
4.02ppb
NO2
0.34ppm
CO
AQI 44
Good
6.39μg/m³
PM2.5
28.93μg/m³
PM10
47.45ppb
O3
0.49ppb
SO2
5.41ppb
NO2
0.30ppm
CO
AQI 44
Good
8.19μg/m³
PM2.5
31.89μg/m³
PM10
47.36ppb
O3
0.47ppb
SO2
5.39ppb
NO2
0.31ppm
CO
AQI 49
Good
9.03μg/m³
PM2.5
38.73μg/m³
PM10
46.45ppb
O3
0.49ppb
SO2
5.12ppb
NO2
0.31ppm
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 Radnor, Pennsylvania is updated every hour.
The worst air quality in Radnor, Pennsylvania in the last 24 hours was observed at 10:00:00 on 2026-08-12.
In the last 24 hrs, the best air quality in Radnor, Pennsylvania was observed at 07:00:00 on 2026-08-12.
The current air quality in Radnor, Pennsylvania is 49, categorized as Good based on real-time data.
The most common pollutant in Radnor, Pennsylvania is PM2.5.
If the air quality in Radnor, Pennsylvania is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Radnor, Pennsylvania is 8.576 μg/m3.
The current PM10 concentration at Radnor, Pennsylvania is 38.432 μg/m3.
The current carbon monoxide (CO) concentration at Radnor, Pennsylvania is 0.316 ppm.
The current sulfur dioxide (SO2) concentration at Radnor, Pennsylvania is 0.495 ppb.
The current ozone (O3) concentration at Radnor, Pennsylvania is 52.145 ppm.
The current nitrogen dioxide (NO2) concentration at Radnor, Pennsylvania is 5.056 ppb.
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