Stay updated with real-time air quality in Allentown, 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)
18
Good
Allentown, Pennsylvania
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
1.78 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
9.38 μg/m³
0
55
155
255
425
605+
18.81 ppb
0
55
71
86
201
201+
0.62 ppb
0
36
76
186
605
1005+
10.79 ppb
0
54
101
361
1250
2050+
0.39 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Allentown, Pennsylvania
Allentown, Pennsylvania
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AQI 25
Good
1.91μg/m³
PM2.5
11.08μg/m³
PM10
26.86ppb
O3
0.56ppb
SO2
10.56ppb
NO2
0.39ppm
CO
AQI 23
Good
2.37μg/m³
PM2.5
14.28μg/m³
PM10
25.22ppb
O3
0.55ppb
SO2
11.32ppb
NO2
0.39ppm
CO
AQI 23
Good
2.13μg/m³
PM2.5
12.71μg/m³
PM10
25.08ppb
O3
0.56ppb
SO2
11.27ppb
NO2
0.39ppm
CO
AQI 23
Good
2.44μg/m³
PM2.5
14.72μg/m³
PM10
25.14ppb
O3
0.55ppb
SO2
11.51ppb
NO2
0.39ppm
CO
AQI 20
Good
1.68μg/m³
PM2.5
9.52μg/m³
PM10
22.02ppb
O3
0.56ppb
SO2
12.73ppb
NO2
0.39ppm
CO
AQI 23
Good
1.96μg/m³
PM2.5
11.42μg/m³
PM10
24.75ppb
O3
0.56ppb
SO2
11.54ppb
NO2
0.39ppm
CO
Air quality and pollutant data for Pennsylvania, USA are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.
Source: Ambee Data Sources
The air quality information for Allentown, Pennsylvania is updated every hour for accuracy.
In the past 24 hours, the air quality in Allentown, Pennsylvania was at its worst at 08:00:00 on 2026-11-12.
In the last 24 hours, the best air quality in Allentown, Pennsylvania was observed at 06:00:00 on 2026-11-12.
As of now, the AQI in Allentown, Pennsylvania is 18, indicating Good conditions.
Allentown, Pennsylvania air has the highest levels of O3.
Poor air quality in Allentown, Pennsylvania means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Allentown, Pennsylvania are currently 1.782 μg/m3.
The PM10 concentration in Allentown, Pennsylvania is 9.382 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Allentown, Pennsylvania is 0.389 ppm.
Currently, Allentown, Pennsylvania has a sulfur dioxide (SO2) concentration of 0.618 ppb.
The current ozone (O3) level in Allentown, Pennsylvania at the moment is 18.814 ppm.
Nitrogen dioxide (NO2) level in Allentown, Pennsylvania at the moment is 10.794 ppb.
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