Stay updated with real-time air quality in Guildford, Surrey 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)
28
Good
Guildford, Surrey
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.22 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
9.77 μg/m³
0
55
155
255
425
605+
29.89 ppb
0
55
71
86
201
201+
0.80 ppb
0
36
76
186
605
1005+
5.02 ppb
0
54
101
361
1250
2050+
0.11 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Guildford, Surrey
Guildford, Surrey
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AQI 22
Good
3.83μg/m³
PM2.5
13.14μg/m³
PM10
24.33ppb
O3
0.70ppb
SO2
9.71ppb
NO2
0.16ppm
CO
AQI 22
Good
3.83μg/m³
PM2.5
13.14μg/m³
PM10
24.33ppb
O3
0.70ppb
SO2
9.71ppb
NO2
0.16ppm
CO
AQI 23
Good
3.02μg/m³
PM2.5
10.66μg/m³
PM10
24.85ppb
O3
0.81ppb
SO2
10.87ppb
NO2
0.16ppm
CO
AQI 22
Good
3.43μg/m³
PM2.5
6.76μg/m³
PM10
24.01ppb
O3
0.69ppb
SO2
10.24ppb
NO2
0.16ppm
CO
AQI 21
Good
2.83μg/m³
PM2.5
6.20μg/m³
PM10
23.08ppb
O3
0.75ppb
SO2
8.90ppb
NO2
0.16ppm
CO
AQI 22
Good
3.43μg/m³
PM2.5
6.76μg/m³
PM10
24.01ppb
O3
0.69ppb
SO2
10.24ppb
NO2
0.16ppm
CO
Air quality and pollutant data for Surrey, UK 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 Guildford, Surrey is updated every hour for accuracy.
In the past 24 hours, the air quality in Guildford, Surrey was at its worst at 11:00:00 on 2026-05-13.
In the last 24 hours, the best air quality in Guildford, Surrey was observed at 08:00:00 on 2026-05-14.
As of now, the AQI in Guildford, Surrey is 22, indicating Good conditions.
Guildford, Surrey air has the highest levels of O3.
Poor air quality in Guildford, Surrey means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Guildford, Surrey are currently 2.997 μg/m3.
The PM10 concentration in Guildford, Surrey is 9.558 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Guildford, Surrey is 0.157 ppm.
Currently, Guildford, Surrey has a sulfur dioxide (SO2) concentration of 0.71 ppb.
The current ozone (O3) level in Guildford, Surrey at the moment is 24.054 ppm.
Nitrogen dioxide (NO2) level in Guildford, Surrey at the moment is 10.734 ppb.
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