Stay updated with real-time air quality in Winchester, Hampshire 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)
49
Good
Winchester, Hampshire
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
9.32 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
15.32 μg/m³
0
55
155
255
425
605+
27.74 ppb
0
55
71
86
201
201+
0.44 ppb
0
36
76
186
605
1005+
1.64 ppb
0
54
101
361
1250
2050+
0.24 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Winchester, Hampshire
Winchester, Hampshire
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AQI 22
Good
3.86μg/m³
PM2.5
9.67μg/m³
PM10
17.19ppb
O3
0.40ppb
SO2
8.49ppb
NO2
0.04ppm
CO
AQI 22
Good
3.86μg/m³
PM2.5
9.86μg/m³
PM10
17.05ppb
O3
0.39ppb
SO2
8.28ppb
NO2
0.04ppm
CO
AQI 22
Good
3.89μg/m³
PM2.5
10.06μg/m³
PM10
16.96ppb
O3
0.39ppb
SO2
8.36ppb
NO2
0.04ppm
CO
AQI 22
Good
3.76μg/m³
PM2.5
9.21μg/m³
PM10
17.73ppb
O3
0.40ppb
SO2
8.61ppb
NO2
0.04ppm
CO
AQI 22
Good
3.88μg/m³
PM2.5
9.59μg/m³
PM10
17.38ppb
O3
0.40ppb
SO2
8.33ppb
NO2
0.04ppm
CO
AQI 22
Good
3.94μg/m³
PM2.5
9.25μg/m³
PM10
17.85ppb
O3
0.41ppb
SO2
10.04ppb
NO2
0.04ppm
CO
Air quality data and pollutant measurements for Hampshire, UK adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.
Source: Ambee Data Sources
The air quality for Winchester, Hampshire is updated every hour.
The worst air quality in Winchester, Hampshire in the last 24 hours was observed at 02:00:00 on 2025-07-17.
In the last 24 hrs, the best air quality in Winchester, Hampshire was observed at 03:00:00 on 2025-07-17.
The current air quality in Winchester, Hampshire is 22, categorized as Good based on real-time data.
The most common pollutant in Winchester, Hampshire is PM2.5.
If the air quality in Winchester, Hampshire is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Winchester, Hampshire is 3.812 μg/m3.
The current PM10 concentration at Winchester, Hampshire is 8.673 μg/m3.
The current carbon monoxide (CO) concentration at Winchester, Hampshire is 0.224 ppm.
The current sulfur dioxide (SO2) concentration at Winchester, Hampshire is 1.007 ppb.
The current ozone (O3) concentration at Winchester, Hampshire is 15.519 ppm.
The current nitrogen dioxide (NO2) concentration at Winchester, Hampshire is 7.13 ppb.
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