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)
38
Good
Guilford, Pennsylvania
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
6.95 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
20.06 μg/m³
0
55
155
255
425
605+
31.87 ppb
0
55
71
86
201
201+
0.48 ppb
0
36
76
186
605
1005+
8.85 ppb
0
54
101
361
1250
2050+
0.29 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Guilford, Pennsylvania
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AQI 38
Good
6.95μg/m³
PM2.5
20.00μg/m³
PM10
30.91ppb
O3
0.48ppb
SO2
8.73ppb
NO2
0.29ppm
CO
AQI 34
Good
3.02μg/m³
PM2.5
14.81μg/m³
PM10
37.05ppb
O3
0.54ppb
SO2
9.28ppb
NO2
0.29ppm
CO
AQI 38
Good
7.21μg/m³
PM2.5
29.58μg/m³
PM10
30.71ppb
O3
0.49ppb
SO2
9.27ppb
NO2
0.29ppm
CO
AQI 27
Good
1.45μg/m³
PM2.5
5.65μg/m³
PM10
29.18ppb
O3
0.49ppb
SO2
13.74ppb
NO2
0.30ppm
CO
AQI 27
Good
1.40μg/m³
PM2.5
5.51μg/m³
PM10
29.17ppb
O3
0.49ppb
SO2
13.79ppb
NO2
0.30ppm
CO
AQI 28
Good
3.30μg/m³
PM2.5
14.48μg/m³
PM10
30.08ppb
O3
0.58ppb
SO2
14.56ppb
NO2
0.29ppm
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 03:00:00 on 2026-01-22.
In the last 24 hours, the best air quality in Guilford, Pennsylvania was observed at 08:00:00 on 2026-01-23.
As of now, the AQI in Guilford, Pennsylvania is 38, indicating Good 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 6.954 μg/m3.
The PM10 concentration in Guilford, Pennsylvania is 20.062 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Guilford, Pennsylvania is 0.295 ppm.
Currently, Guilford, Pennsylvania has a sulfur dioxide (SO2) concentration of 0.485 ppb.
The current ozone (O3) level in Guilford, Pennsylvania at the moment is 31.872 ppm.
Nitrogen dioxide (NO2) level in Guilford, Pennsylvania at the moment is 8.85 ppb.
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