Real-time air quality index in Horley, Surrey today
Stay updated with real-time air quality in Horley, 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)
60
Moderate
Horley, Surrey
Last updated: ... (Local time)
Common air pollutants in Horley, Surrey
Good
Fine
Moderate
Poor
Very poor
Hazardous
Particulate Matter2.5 (PM2.5)
14.00 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
Particulate Matter10 (PM10)
23.00 μg/m³
0
55
155
255
425
605+
Ozone (O3)
39.82 ppb
0
55
71
86
201
201+
Sulfur Dioxide (SO2)
0.46 ppb
0
36
76
186
605
1005+
Nitrogen Dioxide (NO2)
4.15 ppb
0
54
101
361
1250
2050+
Carbon Monoxide (CO)
0.01 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Horley, Surrey
Horley, Surrey
Scroll To Air Quality Map
Track live Horley, Surrey air quality forecast and history
Horley Loading...
Horley, Surrey air quality map: Real-time AQI near you
Air quality in nearby cities
Crawley, West Sussex
AQI 60
Moderate
13.72μg/m³
PM2.5
22.91μg/m³
PM10
38.90ppb
O3
0.46ppb
SO2
3.15ppb
NO2
0.01ppm
CO
Redhill, Surrey
AQI 58
Moderate
12.51μg/m³
PM2.5
26.00μg/m³
PM10
39.63ppb
O3
0.45ppb
SO2
4.38ppb
NO2
0.01ppm
CO
Reigate, Surrey
AQI 58
Moderate
12.88μg/m³
PM2.5
25.31μg/m³
PM10
39.64ppb
O3
0.45ppb
SO2
3.47ppb
NO2
0.01ppm
CO
East Grinstead, West Sussex
AQI 66
Moderate
16.56μg/m³
PM2.5
23.31μg/m³
PM10
37.16ppb
O3
0.47ppb
SO2
4.63ppb
NO2
0.01ppm
CO
Dorking, Surrey
AQI 62
Moderate
15.07μg/m³
PM2.5
31.75μg/m³
PM10
39.57ppb
O3
0.45ppb
SO2
6.99ppb
NO2
0.01ppm
CO
Caterham, Surrey
AQI 49
Good
9.35μg/m³
PM2.5
31.32μg/m³
PM10
39.30ppb
O3
0.43ppb
SO2
6.79ppb
NO2
0.00ppm
CO
How accurate is Surrey, UK air quality data?
Air quality measurements for Surrey, UK meet strict US EPA standards. These measurements are collected from reliable sources, including satellites and ground-based monitoring systems. Advanced algorithms and machine learning techniques are applied to the data, factoring in variables such as traffic and population density, to ensure precision and reliability.
Source: Ambee Data Sources
Frequently asked questions
How frequently is the air quality data for Horley, Surrey updated?
Air quality data for Horley, Surrey is updated on an hourly basis.
When did Horley, Surrey experience the worst air quality in the last 24 hours?
The worst air quality in Horley, Surrey was recorded at 08:00:00 on 2026-07-18.
When did Horley, Surrey have its best air quality in the last 24 hours?
The best air quality in Horley, Surrey was recorded at 06:00:00 on 2026-07-17.
What is the real-time air quality index for Horley, Surrey?
The real-time air quality index in Horley, Surrey is 60, currently categorized as Moderate.
Which pollutant is found most often in Horley, Surrey?
The most common pollutant in Horley, Surrey is PM2.5.
What can I do if the air quality in Horley, Surrey is poor?
If the air quality in Horley, Surrey is poor, limit outdoor activities and use a mask to safeguard your health.
What are the current PM2.5 levels in Horley, Surrey?
The measured PM2.5 levels in Horley, Surrey at present are 14 μg/m3.
What are the current PM10 levels at Horley, Surrey?
The current PM10 levels in Horley, Surrey are 23 μg/m3.
What are the current carbon monoxide (CO) levels at Horley, Surrey?
The current carbon monoxide (CO) level in Horley, Surrey is 0.006 ppm.
What are the current sulfur dioxide (SO2) levels at Horley, Surrey?
The current sulfur dioxide (SO2) levels in Horley, Surrey are 0.46 ppb.
What are the current ozone (O3) levels at Horley, Surrey?
The current ozone (O3) levels at Horley, Surrey is 39.819 ppm.
What are the current nitrogen dioxide (NO2) levels at Horley, Surrey?
The current nitrogen dioxide (NO2) levels at Horley, Surrey is 4.149 ppb.
All Rights Reserved © Ambee Inc. 2025