Real-time air quality index in Alton, Hampshire today
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)
27
Good
Alton, Hampshire
Last updated: ... (Local time)
Common air pollutants in Alton, Hampshire
Good
Fine
Moderate
Poor
Very poor
Hazardous
Particulate Matter2.5 (PM2.5)
4.55 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
Particulate Matter10 (PM10)
9.00 μg/m³
0
55
155
255
425
605+
Ozone (O3)
22.94 ppb
0
55
71
86
201
201+
Sulfur Dioxide (SO2)
0.61 ppb
0
36
76
186
605
1005+
Nitrogen Dioxide (NO2)
4.40 ppb
0
54
101
361
1250
2050+
Carbon Monoxide (CO)
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
High
Alton, Hampshire
Alton, Hampshire
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Alton, Hampshire air quality map: Real-time AQI near you
Air quality in nearby cities
Farnham, Surrey
AQI 27
Good
4.59μg/m³
PM2.5
8.63μg/m³
PM10
20.69ppb
O3
0.69ppb
SO2
5.02ppb
NO2
0.20ppm
CO
Basingstoke, Hampshire
AQI 21
Good
3.41μg/m³
PM2.5
8.83μg/m³
PM10
22.96ppb
O3
0.59ppb
SO2
3.86ppb
NO2
0.20ppm
CO
Petersfield, Hampshire
AQI 27
Good
4.71μg/m³
PM2.5
8.36μg/m³
PM10
23.09ppb
O3
0.60ppb
SO2
4.45ppb
NO2
0.20ppm
CO
Fleet, Hampshire
AQI 22
Good
3.50μg/m³
PM2.5
8.67μg/m³
PM10
19.49ppb
O3
0.66ppb
SO2
7.64ppb
NO2
0.20ppm
CO
Weybourne, Surrey
AQI 27
Good
4.59μg/m³
PM2.5
8.63μg/m³
PM10
20.69ppb
O3
0.69ppb
SO2
5.02ppb
NO2
0.20ppm
CO
Aldershot, Hampshire
AQI 27
Good
4.59μg/m³
PM2.5
8.63μg/m³
PM10
20.69ppb
O3
0.69ppb
SO2
5.02ppb
NO2
0.20ppm
CO
How accurate is Hampshire, UK air quality data?
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
Frequently asked questions
How frequently is the air quality data for Alton, Hampshire updated?
Air quality data for Alton, Hampshire is updated on an hourly basis.
When did Alton, Hampshire experience the worst air quality in the last 24 hours?
The worst air quality in Alton, Hampshire was recorded at 07:00:00 on 2026-03-13.
When did Alton, Hampshire have its best air quality in the last 24 hours?
The best air quality in Alton, Hampshire was recorded at 11:00:00 on 2026-03-14.
What is the real-time air quality index for Alton, Hampshire?
The real-time air quality index in Alton, Hampshire is 27, currently categorized as Good.
Which pollutant is found most often in Alton, Hampshire?
The most common pollutant in Alton, Hampshire is PM2.5.
What can I do if the air quality in Alton, Hampshire is poor?
If the air quality in Alton, Hampshire is poor, limit outdoor activities and use a mask to safeguard your health.
What are the current PM2.5 levels in Alton, Hampshire?
The measured PM2.5 levels in Alton, Hampshire at present are 4.548 μg/m3.
What are the current PM10 levels at Alton, Hampshire?
The current PM10 levels in Alton, Hampshire are 8.998 μg/m3.
What are the current carbon monoxide (CO) levels at Alton, Hampshire?
The current carbon monoxide (CO) level in Alton, Hampshire is 0.197 ppm.
What are the current sulfur dioxide (SO2) levels at Alton, Hampshire?
The current sulfur dioxide (SO2) levels in Alton, Hampshire are 0.607 ppb.
What are the current ozone (O3) levels at Alton, Hampshire?
The current ozone (O3) levels at Alton, Hampshire is 22.938 ppm.
What are the current nitrogen dioxide (NO2) levels at Alton, Hampshire?
The current nitrogen dioxide (NO2) levels at Alton, Hampshire is 4.401 ppb.
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