Stay updated with real-time air quality in Chichester, 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)
25
Good
Chichester, West Sussex
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.24 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
18.04 μg/m³
0
55
155
255
425
605+
26.59 ppb
0
55
71
86
201
201+
0.49 ppb
0
36
76
186
605
1005+
6.03 ppb
0
54
101
361
1250
2050+
0.31 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Chichester, West Sussex
Chichester, West Sussex
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AQI 27
Good
4.65μg/m³
PM2.5
19.71μg/m³
PM10
26.53ppb
O3
0.50ppb
SO2
6.04ppb
NO2
0.31ppm
CO
AQI 27
Good
4.65μg/m³
PM2.5
19.71μg/m³
PM10
26.53ppb
O3
0.50ppb
SO2
6.04ppb
NO2
0.31ppm
CO
AQI 25
Good
3.55μg/m³
PM2.5
15.05μg/m³
PM10
26.93ppb
O3
0.46ppb
SO2
6.74ppb
NO2
0.31ppm
CO
AQI 25
Good
4.24μg/m³
PM2.5
18.04μg/m³
PM10
26.59ppb
O3
0.49ppb
SO2
6.03ppb
NO2
0.31ppm
CO
AQI 26
Good
3.32μg/m³
PM2.5
7.82μg/m³
PM10
27.65ppb
O3
0.45ppb
SO2
7.42ppb
NO2
0.31ppm
CO
AQI 26
Good
3.39μg/m³
PM2.5
7.84μg/m³
PM10
27.78ppb
O3
0.45ppb
SO2
7.69ppb
NO2
0.31ppm
CO
Air quality measurements for West Sussex, 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
Air quality data for Chichester, West Sussex is updated on an hourly basis.
The worst air quality in Chichester, West Sussex was recorded at 11:00:00 on 2026-09-27.
The best air quality in Chichester, West Sussex was recorded at 04:00:00 on 2026-09-28.
The real-time air quality index in Chichester, West Sussex is 25, currently categorized as Good.
The most common pollutant in Chichester, West Sussex is O3.
If the air quality in Chichester, West Sussex is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in Chichester, West Sussex at present are 4.237 μg/m3.
The current PM10 levels in Chichester, West Sussex are 18.04 μg/m3.
The current carbon monoxide (CO) level in Chichester, West Sussex is 0.312 ppm.
The current sulfur dioxide (SO2) levels in Chichester, West Sussex are 0.486 ppb.
The current ozone (O3) levels at Chichester, West Sussex is 26.586 ppm.
The current nitrogen dioxide (NO2) levels at Chichester, West Sussex is 6.033 ppb.
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