Stay updated with real-time air quality in Horsham, West Sussex 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)
52
Moderate
Horsham, West Sussex
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
10.22 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
17.68 μg/m³
0
55
155
255
425
605+
20.24 ppb
0
55
71
86
201
201+
0.76 ppb
0
36
76
186
605
1005+
5.46 ppb
0
54
101
361
1250
2050+
0.24 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
High
Horsham, West Sussex
Horsham, West Sussex
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AQI 23
Good
3.25μg/m³
PM2.5
10.92μg/m³
PM10
25.46ppb
O3
0.79ppb
SO2
3.56ppb
NO2
0.24ppm
CO
AQI 19
Good
3.12μg/m³
PM2.5
7.01μg/m³
PM10
19.73ppb
O3
0.83ppb
SO2
3.62ppb
NO2
0.24ppm
CO
AQI 24
Good
2.87μg/m³
PM2.5
10.45μg/m³
PM10
25.94ppb
O3
0.73ppb
SO2
3.80ppb
NO2
0.24ppm
CO
AQI 18
Good
3.00μg/m³
PM2.5
6.00μg/m³
PM10
18.82ppb
O3
0.83ppb
SO2
3.19ppb
NO2
0.24ppm
CO
AQI 26
Good
3.40μg/m³
PM2.5
12.36μg/m³
PM10
27.88ppb
O3
0.80ppb
SO2
3.03ppb
NO2
0.24ppm
CO
AQI 26
Good
3.40μg/m³
PM2.5
12.36μg/m³
PM10
27.88ppb
O3
0.80ppb
SO2
3.03ppb
NO2
0.24ppm
CO
The air quality data for West Sussex, UK is gathered from reliable sources such as satellites and monitoring stations, adhering to US EPA guidelines. With the help of advanced algorithms and machine learning, factors like traffic and population density are analyzed to deliver accurate and dependable results.
Source: Ambee Data Sources
Air quality updates for Horsham, West Sussex are available every hour.
Horsham, West Sussex experienced its worst air quality at 09:00:00, 2025-07-22.
The best air quality in Horsham, West Sussex was observed at 04:00:00 on 2025-07-22.
The air quality in Horsham, West Sussex right now is Good, with an AQI of 19.
In Horsham, West Sussex, O3 is the most frequently found pollutant.
When air quality in Horsham, West Sussex is compromised, staying indoors and wearing a mask can reduce health risks.
Horsham, West Sussex currently has a PM2.5 concentration of 2.861 μg/m3.
Horsham, West Sussex currently has a PM10 concentration of 9.467 μg/m3.
The current carbon monoxide (CO) level in Horsham, West Sussex is 0.24 ppm.
The current sulfur dioxide (SO2) concentration in Horsham, West Sussex is 0.695 ppb.
Horsham, West Sussex currently has an ozone (O3) concentration of 20.883 ppm.
The current level of nitrogen dioxide (NO2) in Horsham, West Sussex is 3.217 ppb.
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