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

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.75 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
17.33 μg/m³
0
55
155
255
425
605+
52.52 ppb
0
55
71
86
201
201+
0.23 ppb
0
36
76
186
605
1005+
4.05 ppb
0
54
101
361
1250
2050+
0.23 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Westtown, Pennsylvania
Westtown, Pennsylvania
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AQI 47
Good
3.76μg/m³
PM2.5
17.36μg/m³
PM10
51.20ppb
O3
0.23ppb
SO2
4.07ppb
NO2
0.23ppm
CO
AQI 47
Good
3.76μg/m³
PM2.5
17.36μg/m³
PM10
51.20ppb
O3
0.23ppb
SO2
4.07ppb
NO2
0.23ppm
CO
AQI 48
Good
4.23μg/m³
PM2.5
20.67μg/m³
PM10
52.31ppb
O3
0.21ppb
SO2
4.04ppb
NO2
0.25ppm
CO
AQI 47
Good
3.76μg/m³
PM2.5
17.36μg/m³
PM10
51.20ppb
O3
0.23ppb
SO2
4.07ppb
NO2
0.23ppm
CO
AQI 47
Good
3.76μg/m³
PM2.5
17.36μg/m³
PM10
51.20ppb
O3
0.23ppb
SO2
4.07ppb
NO2
0.23ppm
CO
AQI 44
Good
3.65μg/m³
PM2.5
13.96μg/m³
PM10
47.12ppb
O3
0.22ppb
SO2
4.00ppb
NO2
0.23ppm
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 Westtown, Pennsylvania is updated every hour.
The worst air quality in Westtown, Pennsylvania in the last 24 hours was observed at 10:00:00 on 2026-07-22.
In the last 24 hrs, the best air quality in Westtown, Pennsylvania was observed at 12:00:00 on 2026-07-23.
The current air quality in Westtown, Pennsylvania is 49, categorized as Good based on real-time data.
The most common pollutant in Westtown, Pennsylvania is O3.
If the air quality in Westtown, Pennsylvania is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Westtown, Pennsylvania is 3.747 μg/m3.
The current PM10 concentration at Westtown, Pennsylvania is 17.334 μg/m3.
The current carbon monoxide (CO) concentration at Westtown, Pennsylvania is 0.229 ppm.
The current sulfur dioxide (SO2) concentration at Westtown, Pennsylvania is 0.225 ppb.
The current ozone (O3) concentration at Westtown, Pennsylvania is 52.519 ppm.
The current nitrogen dioxide (NO2) concentration at Westtown, Pennsylvania is 4.053 ppb.
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