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Forecast

Air Pollution Forecast from King's College London Environmental Research Group

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Annual air quality assessment and related reports.

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Forecast

Today

Forecast icon

Issued: 21/09/2017 10:33:00

Pollution Band: Low


Details

Friday will have a chilly start with any isolated fog patches clearing. A dry and sunny morning, then cloud will thicken during the afternoon, especially across western areas, but likely remaining dry.

Nitrogen dioxide and particulate levels may increase around the morning rush hours in-particular due to the patchy fog and the low wind speeds. Overall though, the clean feed of south-westerly air through the day should ensure pollution is dispersed and remains 'Low' for the following pollutants throughout the forecast period:

Nitrogen Dioxide
Ozone
PM10 Particulates
PM2.5 Particulates
Sulphur Dioxide


This 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.

Outlook

Forecast icon

Issued: 22/09/2017 11:31:00

Start: Saturday 23 September

Finish: end of Monday 25 September

Pollution Band: Low


Details

Saturday will be mainly cloudy with periods of rain. Clean air arriving from the Atlantic should ensure local air pollution is dispersed.
Sunday will remain dry with sunny intervals, feeling warm. The air feed will start arriving from the continent by the end of Sunday. Any imported particulates only arriving in the last part of the day, levels of PM10 and PM2.5 particulate are expected to remain in the 'Low' banding.

On Monday the air arriving in London and the south-east, will travel over the Paris region and past industrial areas of northern France, bringing import of pollutants. This, combined with our local emissions is likely to result in 'Moderate' particulate pollution. Long periods of cloud cover will limit the potential for the formation of ground-level ozone.

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

Nitrogen Dioxide
PM10 Particulates
PM2.5 Particulates
Ozone
Sulphur Dioxide


This 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.


The Ealing 8 monitoring site on Horn Lane, Acton forms part of an investigation of the local PM10 sources at this location. The site is affected by specific local sources of PM10 particulate and it is not representative of other areas within the Borough.


How to use the Daily Air Quality Index *

  • Step 1: Determine whether you (or your children) are likely to be at-risk from air pollution. Your doctor may also be able to give you advice.
  • Step 2: If you may be at-risk, and are planning strenuous activity outdoors, check the air pollution forecast.
  • Step 3: Use the health messages corresponding to the highest forecast level of pollution as a guide.
Air Pollution Banding Value Accompanying health messages for at-risk groups and
the general population
At-risk individuals ** General population
Low 1-3 Enjoy your usual outdoor activities.

Enjoy your usual outdoor activities.

Moderate 4-6 Adults and children with lung problems, and adults with heart problems, who experience symptoms, should consider reducing strenuous physical activity, particularly outdoors. Enjoy your usual outdoor activities.
High 7-9 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. Anyone experiencing discomfort such as sore eyes, cough or sore throat should consider reducing activity, particularly outdoors.
Very High 10 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. Reduce physical exertion, particularly outdoors, especially if you experience symptoms such as cough or sore throat.

* Daily Air Quality Index information sourced from UK-AIR (Air Information Resource) website.

* Adults and children with heart or lung problems are at greater risk of symptoms. Follow your doctor's usual advice about exercising and managing your condition. It is possible that very sensitive individuals may experience health effects even on Low air pollution days.

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