London Air Quality Forecast – Current Air Pollution

25th June 2019 / By / London Pollution

The latest air quality forecast for London. Pollution and particulate levels updated every hour.




Date:

London Air Pollution Summary: Low

Low air pollution forecast valid from Tuesday 25 June to end of Tuesday 25 June GMT.

Heavy rain very early on Tuesday should clear to give a cloudy morning with sunshine expected later in the afternoon and temperatures climbing into the mid-20s. There is the possibility of thunderstorms breaking out at any time until the cloud clears.

It’s expected ozone levels will increase rapidly once the sun breaks through later in the afternoon. However, earlier cloud cover for a significant part of the day should limit photochemical generation of ozone and it’s not expected that the ozone episode later in the afternoon will be of sufficient duration for the index to reach ‘Moderate’ overall.

Locally, a light predominantly northerly or north-easterly breeze is forecast. Initially air arriving will have travelled up from the Bay of Biscay but by afternoon it will have spent time over the near continent and by late evening will have spent time over France and Germany.

Particulate levels are expected to increase later in the evening as air arrives having travelled at low altitude over the continent. This import is expected to be too little too late though and as a result particulate levels should remain ‘Low’ overall. A light breeze locally throughout the day should also aid dispersion.

Air pollution is expected to remain 'Low' throughout the day for the following pollutants:

Nitrogen Dioxide
Ozone
PM10 Particulate
PM2.5 Particulate
Sulphur Dioxide

Air Quality Pollution Levels

Nitrogen Dioxide Low
Ozone Low
PM10 Particulate Low
PM2.5 Particulate Low
Sulphur Dioxide Low

London Air Quality Tomorrow: Low

Low air pollution forecast valid from Wednesday 26 June to end of Wednesday 26 June GMT.

A cloudy start to Wednesday before some sunshine later in the day. There is the possibility of thunderstorms breaking out any time until the cloud clears.

Temperatures into the mid-20s expected although should feel cooler than of late in a fresh north-easterly North-Sea breeze.

The breeze should ensure good dispersion of any emissions and cloud cover for most of the day should limit photochemical generation of ozone.

Air pollution is expected to remain 'Low' throughout the day for the following pollutants:

Nitrogen Dioxide
Ozone
PM10 Particulate
PM2.5 Particulate
Sulphur Dioxide

Air Quality Pollution Levels: Tomorrow

Nitrogen Dioxide Low
Ozone Low
PM10 Particulate Low
PM2.5 Particulate Low
Sulphur Dioxide Low

Air Pollution Banding Value

Low 1-3
At Risk Individuals: Enjoy your usual outdoor activities.
General Population: Enjoy your usual outdoor activities.

Moderate 4-6
At Risk Individuals: Adults and children with lung problems, and adults with heart problems, who experience symptoms, should consider reducing strenuous physical activity, particularly outdoors.

General Population: Enjoy your usual outdoor activities.

High 7-9
At Risk Individuals: Adults and children with lung problems, and adults with heart problems, should reduce strenuous physical exertion, particularly outdoors, and particularly if they experience symptoms. People with asthma may find they need to use their reliever inhaler more often. Older people should also reduce physical exertion.

General Population: Anyone experiencing discomfort such as sore eyes, cough or sore throat should consider reducing activity, particularly outdoors.

Very High 10
At Risk Individuals: Adults and children with lung problems, adults with heart problems, and older people, should avoid strenuous physical activity. People with asthma may find they need to use their reliever inhaler more often.

General Population: Reduce physical exertion, particularly outdoors, especially if you experience symptoms such as cough or sore throat.

Air Quality Disclaimer

This London air quality forecast is intended to provide information on expected pollution levels in areas of significant public exposure.

It may not apply in very specific locations close to unusually strong or short-lived local sources of pollution.

Data supplied by TfL in conjunction with London Air.

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