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)
37
Good
Allentown, Pennsylvania
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.72 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
16.12 μg/m³
0
55
155
255
425
605+
39.90 ppb
0
55
71
86
201
201+
0.32 ppb
0
36
76
186
605
1005+
3.41 ppb
0
54
101
361
1250
2050+
0.23 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Allentown, Pennsylvania
Allentown, Pennsylvania
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AQI 39
Good
3.70μg/m³
PM2.5
16.02μg/m³
PM10
42.03ppb
O3
0.67ppb
SO2
6.55ppb
NO2
0.34ppm
CO
AQI 39
Good
3.75μg/m³
PM2.5
16.57μg/m³
PM10
42.11ppb
O3
0.66ppb
SO2
6.92ppb
NO2
0.34ppm
CO
AQI 39
Good
3.71μg/m³
PM2.5
16.26μg/m³
PM10
42.15ppb
O3
0.67ppb
SO2
6.93ppb
NO2
0.34ppm
CO
AQI 39
Good
3.76μg/m³
PM2.5
16.62μg/m³
PM10
42.05ppb
O3
0.66ppb
SO2
7.26ppb
NO2
0.35ppm
CO
AQI 40
Good
3.70μg/m³
PM2.5
16.01μg/m³
PM10
42.80ppb
O3
0.67ppb
SO2
8.43ppb
NO2
0.34ppm
CO
AQI 39
Good
3.70μg/m³
PM2.5
16.10μg/m³
PM10
42.25ppb
O3
0.67ppb
SO2
7.39ppb
NO2
0.34ppm
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 12:00:00 on 2026-01-24.
In the last 24 hours, the best air quality in Allentown, Pennsylvania was observed at 01:00:00 on 2026-01-23.
As of now, the AQI in Allentown, Pennsylvania is 39, 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 3.701 μg/m3.
The PM10 concentration in Allentown, Pennsylvania is 16.057 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Allentown, Pennsylvania is 0.345 ppm.
Currently, Allentown, Pennsylvania has a sulfur dioxide (SO2) concentration of 0.668 ppb.
The current ozone (O3) level in Allentown, Pennsylvania at the moment is 42.067 ppm.
Nitrogen dioxide (NO2) level in Allentown, Pennsylvania at the moment is 6.65 ppb.
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