Live 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)
33
Good
Horley, Surrey
Last updated: ... (Local time)
Major air pollutants in Horley, Surrey
Good
Fine
Moderate
Poor
Very poor
Hazardous
Particulate Matter2.5 (PM2.5)
6.00 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
Particulate Matter10 (PM10)
12.00 μg/m³
0
55
155
255
425
605+
Ozone (O3)
29.81 ppb
0
55
71
86
201
201+
Sulfur Dioxide (SO2)
0.97 ppb
0
36
76
186
605
1005+
Nitrogen Dioxide (NO2)
1.81 ppb
0
54
101
361
1250
2050+
Carbon Monoxide (CO)
0.02 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
High
Horley, Surrey
Horley, Surrey
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Horley, Surrey air quality map: Real-time AQI near you
Air quality in nearby cities
Crawley, West Sussex
AQI 38
Good
7.18μg/m³
PM2.5
12.62μg/m³
PM10
38.85ppb
O3
1.32ppb
SO2
6.83ppb
NO2
0.02ppm
CO
Redhill, Surrey
AQI 44
Good
7.80μg/m³
PM2.5
15.29μg/m³
PM10
38.27ppb
O3
1.35ppb
SO2
8.45ppb
NO2
0.02ppm
CO
Reigate, Surrey
AQI 44
Good
8.23μg/m³
PM2.5
15.03μg/m³
PM10
38.24ppb
O3
1.35ppb
SO2
7.75ppb
NO2
0.02ppm
CO
East Grinstead, West Sussex
AQI 44
Good
8.43μg/m³
PM2.5
15.12μg/m³
PM10
44.98ppb
O3
1.21ppb
SO2
8.55ppb
NO2
0.02ppm
CO
Dorking, Surrey
AQI 44
Good
7.60μg/m³
PM2.5
21.88μg/m³
PM10
41.07ppb
O3
1.30ppb
SO2
6.07ppb
NO2
0.02ppm
CO
Caterham, Surrey
AQI 52
Moderate
9.69μg/m³
PM2.5
21.97μg/m³
PM10
36.87ppb
O3
1.37ppb
SO2
11.54ppb
NO2
0.01ppm
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 02:00:00 on 2025-06-22.
When did Horley, Surrey have its best air quality in the last 24 hours?
The best air quality in Horley, Surrey was recorded at 08:00:00 on 2025-06-22.
What is the real-time air quality index for Horley, Surrey?
The real-time air quality index in Horley, Surrey is 38, currently categorized as Good.
Which pollutant is found most often in Horley, Surrey?
The most common pollutant in Horley, Surrey is O3.
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 7 μg/m3.
What are the current PM10 levels at Horley, Surrey?
The current PM10 levels in Horley, Surrey are 12 μg/m3.
What are the current carbon monoxide (CO) levels at Horley, Surrey?
The current carbon monoxide (CO) level in Horley, Surrey is 0.025 ppm.
What are the current sulfur dioxide (SO2) levels at Horley, Surrey?
The current sulfur dioxide (SO2) levels in Horley, Surrey are 1.26 ppb.
What are the current ozone (O3) levels at Horley, Surrey?
The current ozone (O3) levels at Horley, Surrey is 40.675 ppm.
What are the current nitrogen dioxide (NO2) levels at Horley, Surrey?
The current nitrogen dioxide (NO2) levels at Horley, Surrey is 7.819 ppb.
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