Stay updated with real-time air quality in Williamsport, 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)
54
Moderate
Williamsport, Pennsylvania
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
10.88 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
56.16 μg/m³
0
55
155
255
425
605+
27.73 ppb
0
55
71
86
201
201+
0.69 ppb
0
36
76
186
605
1005+
6.37 ppb
0
54
101
361
1250
2050+
0.66 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Williamsport, Pennsylvania
Williamsport, Pennsylvania
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AQI 52
Moderate
10.23μg/m³
PM2.5
44.57μg/m³
PM10
23.03ppb
O3
0.75ppb
SO2
6.20ppb
NO2
0.58ppm
CO
AQI 54
Moderate
10.70μg/m³
PM2.5
49.88μg/m³
PM10
23.82ppb
O3
0.64ppb
SO2
6.20ppb
NO2
0.54ppm
CO
AQI 49
Good
9.16μg/m³
PM2.5
41.57μg/m³
PM10
24.69ppb
O3
1.26ppb
SO2
6.17ppb
NO2
0.49ppm
CO
AQI 49
Good
9.16μg/m³
PM2.5
41.57μg/m³
PM10
24.69ppb
O3
1.26ppb
SO2
6.17ppb
NO2
0.49ppm
CO
AQI 58
Moderate
12.51μg/m³
PM2.5
60.22μg/m³
PM10
28.63ppb
O3
1.34ppb
SO2
3.14ppb
NO2
0.53ppm
CO
AQI 60
Moderate
13.93μg/m³
PM2.5
55.30μg/m³
PM10
19.92ppb
O3
0.91ppb
SO2
6.05ppb
NO2
0.58ppm
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 Williamsport, Pennsylvania is updated every hour for accuracy.
In the past 24 hours, the air quality in Williamsport, Pennsylvania was at its worst at 05:00:00 on 2025-12-06.
In the last 24 hours, the best air quality in Williamsport, Pennsylvania was observed at 12:00:00 on 2025-12-07.
As of now, the AQI in Williamsport, Pennsylvania is 52, indicating Moderate conditions.
Williamsport, Pennsylvania air has the highest levels of PM2.5.
Poor air quality in Williamsport, Pennsylvania means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Williamsport, Pennsylvania are currently 10.192 μg/m3.
The PM10 concentration in Williamsport, Pennsylvania is 44.639 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Williamsport, Pennsylvania is 0.57 ppm.
Currently, Williamsport, Pennsylvania has a sulfur dioxide (SO2) concentration of 0.809 ppb.
The current ozone (O3) level in Williamsport, Pennsylvania at the moment is 23.316 ppm.
Nitrogen dioxide (NO2) level in Williamsport, Pennsylvania at the moment is 6.083 ppb.
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