Stay updated with real-time air quality in Caterham, 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)
27
Good
Caterham, Surrey
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.85 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
9.68 μg/m³
0
55
155
255
425
605+
28.58 ppb
0
55
71
86
201
201+
0.58 ppb
0
36
76
186
605
1005+
4.21 ppb
0
54
101
361
1250
2050+
0.31 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Caterham, Surrey
Caterham, Surrey
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AQI 28
Good
4.80μg/m³
PM2.5
9.29μg/m³
PM10
29.99ppb
O3
0.64ppb
SO2
6.17ppb
NO2
0.31ppm
CO
AQI 26
Good
4.44μg/m³
PM2.5
9.25μg/m³
PM10
28.33ppb
O3
0.62ppb
SO2
3.59ppb
NO2
0.31ppm
CO
AQI 26
Good
4.36μg/m³
PM2.5
9.33μg/m³
PM10
28.34ppb
O3
0.63ppb
SO2
3.61ppb
NO2
0.31ppm
CO
AQI 27
Good
3.40μg/m³
PM2.5
7.87μg/m³
PM10
29.13ppb
O3
0.59ppb
SO2
5.25ppb
NO2
0.31ppm
CO
AQI 26
Good
4.00μg/m³
PM2.5
9.00μg/m³
PM10
28.24ppb
O3
0.65ppb
SO2
4.57ppb
NO2
0.31ppm
CO
AQI 38
Good
7.17μg/m³
PM2.5
14.75μg/m³
PM10
29.73ppb
O3
0.59ppb
SO2
6.25ppb
NO2
0.31ppm
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 Caterham, Surrey is updated every hour for accuracy.
In the past 24 hours, the air quality in Caterham, Surrey was at its worst at 02:00:00 on 2026-09-28.
In the last 24 hours, the best air quality in Caterham, Surrey was observed at 01:00:00 on 2026-09-28.
As of now, the AQI in Caterham, Surrey is 27, indicating Good conditions.
Caterham, Surrey air has the highest levels of O3.
Poor air quality in Caterham, Surrey means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Caterham, Surrey are currently 4.847 μg/m3.
The PM10 concentration in Caterham, Surrey is 9.681 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Caterham, Surrey is 0.312 ppm.
Currently, Caterham, Surrey has a sulfur dioxide (SO2) concentration of 0.582 ppb.
The current ozone (O3) level in Caterham, Surrey at the moment is 28.577 ppm.
Nitrogen dioxide (NO2) level in Caterham, Surrey at the moment is 4.207 ppb.
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