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)
44
Good
Williamsport, Pennsylvania
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.61 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
17.00 μg/m³
0
55
155
255
425
605+
47.23 ppb
0
55
71
86
201
201+
0.29 ppb
0
36
76
186
605
1005+
3.46 ppb
0
54
101
361
1250
2050+
0.18 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Williamsport, Pennsylvania
Williamsport, Pennsylvania
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AQI 44
Good
3.57μg/m³
PM2.5
17.03μg/m³
PM10
47.91ppb
O3
0.29ppb
SO2
3.45ppb
NO2
0.18ppm
CO
AQI 43
Good
3.54μg/m³
PM2.5
17.60μg/m³
PM10
45.56ppb
O3
0.29ppb
SO2
3.32ppb
NO2
0.20ppm
CO
AQI 41
Good
3.59μg/m³
PM2.5
15.63μg/m³
PM10
44.15ppb
O3
0.30ppb
SO2
3.32ppb
NO2
0.20ppm
CO
AQI 41
Good
3.59μg/m³
PM2.5
15.63μg/m³
PM10
44.15ppb
O3
0.30ppb
SO2
3.32ppb
NO2
0.20ppm
CO
AQI 38
Good
3.87μg/m³
PM2.5
16.11μg/m³
PM10
40.90ppb
O3
0.30ppb
SO2
3.56ppb
NO2
0.20ppm
CO
AQI 40
Good
3.58μg/m³
PM2.5
13.58μg/m³
PM10
43.09ppb
O3
0.27ppb
SO2
3.33ppb
NO2
0.20ppm
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 09:00:00 on 2026-07-23.
In the last 24 hours, the best air quality in Williamsport, Pennsylvania was observed at 11:00:00 on 2026-07-23.
As of now, the AQI in Williamsport, Pennsylvania is 44, indicating Good conditions.
Williamsport, Pennsylvania air has the highest levels of O3.
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 3.614 μg/m3.
The PM10 concentration in Williamsport, Pennsylvania is 16.999 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Williamsport, Pennsylvania is 0.184 ppm.
Currently, Williamsport, Pennsylvania has a sulfur dioxide (SO2) concentration of 0.288 ppb.
The current ozone (O3) level in Williamsport, Pennsylvania at the moment is 47.226 ppm.
Nitrogen dioxide (NO2) level in Williamsport, Pennsylvania at the moment is 3.464 ppb.
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