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)
54
Moderate
Guilford, Pennsylvania
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
10.71 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
15.64 μg/m³
0
55
155
255
425
605+
19.26 ppb
0
55
71
86
201
201+
0.83 ppb
0
36
76
186
605
1005+
10.22 ppb
0
54
101
361
1250
2050+
0.44 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Guilford, Pennsylvania
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AQI 54
Moderate
10.78μg/m³
PM2.5
26.37μg/m³
PM10
20.38ppb
O3
0.83ppb
SO2
10.43ppb
NO2
0.44ppm
CO
AQI 58
Moderate
12.66μg/m³
PM2.5
54.72μg/m³
PM10
25.04ppb
O3
0.84ppb
SO2
9.19ppb
NO2
0.44ppm
CO
AQI 52
Moderate
10.38μg/m³
PM2.5
37.81μg/m³
PM10
19.07ppb
O3
0.84ppb
SO2
10.54ppb
NO2
0.44ppm
CO
AQI 52
Moderate
9.65μg/m³
PM2.5
41.89μg/m³
PM10
5.18ppb
O3
0.82ppb
SO2
9.37ppb
NO2
0.44ppm
CO
AQI 52
Moderate
9.60μg/m³
PM2.5
41.82μg/m³
PM10
4.88ppb
O3
0.82ppb
SO2
9.38ppb
NO2
0.44ppm
CO
AQI 56
Moderate
12.19μg/m³
PM2.5
55.16μg/m³
PM10
20.78ppb
O3
0.72ppb
SO2
8.10ppb
NO2
0.44ppm
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 05:00:00 on 2025-12-06.
In the last 24 hours, the best air quality in Guilford, Pennsylvania was observed at 06:00:00 on 2025-12-07.
As of now, the AQI in Guilford, Pennsylvania is 54, indicating Moderate conditions.
Guilford, Pennsylvania air has the highest levels of PM2.5.
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 10.707 μg/m3.
The PM10 concentration in Guilford, Pennsylvania is 15.637 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Guilford, Pennsylvania is 0.442 ppm.
Currently, Guilford, Pennsylvania has a sulfur dioxide (SO2) concentration of 0.832 ppb.
The current ozone (O3) level in Guilford, Pennsylvania at the moment is 19.256 ppm.
Nitrogen dioxide (NO2) level in Guilford, Pennsylvania at the moment is 10.225 ppb.
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