Stay updated with real-time air quality in Alton, 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)
54
Moderate
Alton, Hampshire
Last updated: ... (Local time)
Good
Fine
Moderate
Poor
Very poor
Hazardous
10.53 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
24.06 μg/m³
0
55
155
255
425
605+
22.06 ppb
0
55
71
86
201
201+
0.60 ppb
0
36
76
186
605
1005+
4.06 ppb
0
54
101
361
1250
2050+
0.24 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Alton, Hampshire
Alton, Hampshire
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AQI 22
Good
3.93μg/m³
PM2.5
11.16μg/m³
PM10
16.40ppb
O3
0.64ppb
SO2
9.94ppb
NO2
0.02ppm
CO
AQI 22
Good
3.68μg/m³
PM2.5
9.40μg/m³
PM10
13.75ppb
O3
0.61ppb
SO2
8.96ppb
NO2
0.03ppm
CO
AQI 22
Good
3.97μg/m³
PM2.5
11.34μg/m³
PM10
15.77ppb
O3
0.63ppb
SO2
9.99ppb
NO2
0.03ppm
CO
AQI 22
Good
3.61μg/m³
PM2.5
11.45μg/m³
PM10
15.73ppb
O3
0.63ppb
SO2
9.65ppb
NO2
0.02ppm
CO
AQI 22
Good
3.93μg/m³
PM2.5
11.16μg/m³
PM10
16.40ppb
O3
0.64ppb
SO2
9.94ppb
NO2
0.02ppm
CO
AQI 22
Good
3.93μg/m³
PM2.5
11.16μg/m³
PM10
16.40ppb
O3
0.64ppb
SO2
9.94ppb
NO2
0.02ppm
CO
Air quality measurements for Hampshire, 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 Alton, Hampshire is updated on an hourly basis.
The worst air quality in Alton, Hampshire was recorded at 08:00:00 on 2025-07-18.
The best air quality in Alton, Hampshire was recorded at 11:00:00 on 2025-07-19.
The real-time air quality index in Alton, Hampshire is 22, currently categorized as Good.
The most common pollutant in Alton, Hampshire is PM2.5.
If the air quality in Alton, Hampshire is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in Alton, Hampshire at present are 3.983 μg/m3.
The current PM10 levels in Alton, Hampshire are 11.622 μg/m3.
The current carbon monoxide (CO) level in Alton, Hampshire is 0.024 ppm.
The current sulfur dioxide (SO2) levels in Alton, Hampshire are 0.624 ppb.
The current ozone (O3) levels at Alton, Hampshire is 15.304 ppm.
The current nitrogen dioxide (NO2) levels at Alton, Hampshire is 9.955 ppb.
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