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)
22
Good
Guilford, Pennsylvania
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.10 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
18.46 μg/m³
0
55
155
255
425
605+
18.29 ppb
0
55
71
86
201
201+
0.25 ppb
0
36
76
186
605
1005+
3.66 ppb
0
54
101
361
1250
2050+
0.26 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Guilford, Pennsylvania
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AQI 22
Good
4.20μg/m³
PM2.5
19.00μg/m³
PM10
17.00ppb
O3
0.25ppb
SO2
3.55ppb
NO2
0.26ppm
CO
AQI 22
Good
3.90μg/m³
PM2.5
17.31μg/m³
PM10
22.39ppb
O3
0.26ppb
SO2
3.88ppb
NO2
0.26ppm
CO
AQI 22
Good
3.78μg/m³
PM2.5
16.52μg/m³
PM10
11.19ppb
O3
0.33ppb
SO2
3.56ppb
NO2
0.26ppm
CO
AQI 22
Good
4.10μg/m³
PM2.5
18.03μg/m³
PM10
7.58ppb
O3
0.32ppb
SO2
3.60ppb
NO2
0.26ppm
CO
AQI 22
Good
4.14μg/m³
PM2.5
18.00μg/m³
PM10
6.95ppb
O3
0.33ppb
SO2
3.57ppb
NO2
0.26ppm
CO
AQI 22
Good
4.03μg/m³
PM2.5
17.54μg/m³
PM10
11.48ppb
O3
0.35ppb
SO2
4.16ppb
NO2
0.26ppm
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 2026-09-06.
In the last 24 hours, the best air quality in Guilford, Pennsylvania was observed at 12:00:00 on 2026-09-07.
As of now, the AQI in Guilford, Pennsylvania is 22, 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 4.103 μg/m3.
The PM10 concentration in Guilford, Pennsylvania is 18.458 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Guilford, Pennsylvania is 0.258 ppm.
Currently, Guilford, Pennsylvania has a sulfur dioxide (SO2) concentration of 0.253 ppb.
The current ozone (O3) level in Guilford, Pennsylvania at the moment is 18.291 ppm.
Nitrogen dioxide (NO2) level in Guilford, Pennsylvania at the moment is 3.662 ppb.
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