Forecast
Air Pollution Forecast from Imperial College London Environmental Research Group
Today
Issued:
21/07/2021 11:04:36
Pollution Band:
Low
Details
Cooler than of late, with temperatures forecast to reach the low-20s by the afternoon.
Warm temperatures and prolonged summer sunshine are often associated with the photochemical formation of ground level ozone. However, Ozone is expected to remain in the 'Low' banding as the day will be breezier and less warm, and with some thundery rain which will limit the availability of the precursor pollutants required for its formation.
The northerly air flow will also give good dispersion of local emissions.
Air pollution is expected to remain 'Low' for the following pollutants:
Nitrogen Dioxide
Ozone
PM10 Particulate
PM2.5 Particulate
Sulphur Dioxide
Outlook
Issued:
23/07/2021 08:50:40
Start:
Saturday 24 July
Finish:
end of Saturday 24 July
Pollution Band:
Low
Details
Unsettled weather conditions for Saturday as a slow moving low pressure system starts to affect Greater London. With lower temperatures, more cloud cover and thundery storms, the potential for ground level ozone to form will be limited.
For most of the day, the air arriving locally is expected to be a 'clean' feed from the North Sea. However, there is the possibility of some imported particulate pollution late on Saturday as the wind direction changes to draw in air from the near-continent. This though is not expected to be prolonged.
Air pollution is expected to remain 'Low' for the following pollutants during the forecast period:
Nitrogen Dioxide
Ozone
Sulphur Dioxide
PM10 Particulates
PM2.5 Particulates
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. Horn Lane will have increased levels of particulate matter that will not be representative of rest of 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.
Health Advice
| 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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