Stay updated with real-time air quality in Guilford, 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)
64
Moderate
Guilford, Pennsylvania
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
8.20 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
34.52 μg/m³
0
55
155
255
425
605+
58.70 ppb
0
55
71
86
201
201+
0.69 ppb
0
36
76
186
605
1005+
8.46 ppb
0
54
101
361
1250
2050+
0.24 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Guilford, Pennsylvania
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AQI 64
Moderate
9.16μg/m³
PM2.5
28.23μg/m³
PM10
58.80ppb
O3
0.69ppb
SO2
8.44ppb
NO2
0.24ppm
CO
AQI 74
Moderate
8.82μg/m³
PM2.5
27.18μg/m³
PM10
61.66ppb
O3
0.60ppb
SO2
8.71ppb
NO2
0.24ppm
CO
AQI 54
Moderate
8.95μg/m³
PM2.5
43.69μg/m³
PM10
55.83ppb
O3
0.70ppb
SO2
8.45ppb
NO2
0.24ppm
CO
AQI 42
Good
4.53μg/m³
PM2.5
18.26μg/m³
PM10
44.57ppb
O3
0.69ppb
SO2
7.52ppb
NO2
0.24ppm
CO
AQI 41
Good
4.39μg/m³
PM2.5
17.89μg/m³
PM10
44.10ppb
O3
0.69ppb
SO2
7.46ppb
NO2
0.24ppm
CO
AQI 58
Moderate
8.79μg/m³
PM2.5
38.69μg/m³
PM10
56.70ppb
O3
0.54ppb
SO2
9.55ppb
NO2
0.25ppm
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 Guilford, Pennsylvania is updated every hour for accuracy.
In the past 24 hours, the air quality in Guilford, Pennsylvania was at its worst at 11:00:00 on 2026-04-23.
In the last 24 hours, the best air quality in Guilford, Pennsylvania was observed at 07:00:00 on 2026-04-23.
As of now, the AQI in Guilford, Pennsylvania is 64, indicating Moderate conditions.
Guilford, Pennsylvania air has the highest levels of O3.
Poor air quality in Guilford, Pennsylvania means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Guilford, Pennsylvania are currently 8.198 μg/m3.
The PM10 concentration in Guilford, Pennsylvania is 34.516 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Guilford, Pennsylvania is 0.244 ppm.
Currently, Guilford, Pennsylvania has a sulfur dioxide (SO2) concentration of 0.692 ppb.
The current ozone (O3) level in Guilford, Pennsylvania at the moment is 58.703 ppm.
Nitrogen dioxide (NO2) level in Guilford, Pennsylvania at the moment is 8.464 ppb.
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