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Today

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Issued By:
Environmental Research Group
Imperial College London

Issued On: 30/05/2025 10:10:22

Pollution Band: Low

Details

Continuing warm and sunny with temperatures into the mid 20s.

A fresh south west Atlantic air feed with a breeze ensuring dispersion of any local emissions.

Ground-level ozone production, often elevated during sunny and warm weather, is driven by rising temperatures and sunshine acting on emissions such as oxides of nitrogen, Volatile Organic Compounds (VOCs) and carbon monoxide. With a relatively 'clean' air feed and with good dispersion of any local emissions, its not expected there will be the precursors available for ozone formation, so although levels may increase, they should remain 'low' overall. The national Daily Air Quality Index (DAQI) for ozone is measured as a running 8-hourly mean.

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

PM10 Particulates
PM2.5 Particulates
Nitrogen Dioxide
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.

Outlook

Forecast icon

Issued By:
Environmental Research Group
Imperial College London

Issued On: 30/05/2025 10:10:22

Pollution Band: Low

Details

Continuing warm and sunny with temperatures into the mid 20s.

A fresh south west Atlantic air feed with a breeze ensuring dispersion of any local emissions.

Ground-level ozone production, often elevated during sunny and warm weather, is driven by rising temperatures and sunshine acting on emissions such as oxides of nitrogen, Volatile Organic Compounds (VOCs) and carbon monoxide. With a relatively 'clean' air feed and with good dispersion of any local emissions, its not expected there will be the precursors available for ozone formation, so although levels may increase, they should remain 'low' overall. The national Daily Air Quality Index (DAQI) for ozone is measured as a running 8-hourly mean.

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

PM10 Particulates
PM2.5 Particulates
Nitrogen Dioxide
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.

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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