Forecast
Air Pollution Forecast from Imperial College London Environmental Research Group
Today
Issued:
30/06/2025 10:53:29
Pollution Band:
Moderate
Details
A very hot day with clear skies and temperatures possibly reaching into the mid 30s.
A 'clean' south westerly air feed that will have spent some time over the UK, later in the evening arriving more directly in off the North Sea. Locally, a light breeze should help disperse any pollution emissions.
'Moderate' ozone levels are expected, driven by a combination of meteorological and chemical conditions conducive to ozone formation. As temperatures rise and clear skies dominate, photochemical reactions are accelerated to form ground level ozone.
Air pollution is expected to remain 'Low' for the following pollutants:
PM10 Particulates
PM2.5 Particulates
Nitrogen Dioxide
Sulphur Dioxide
Outlook
Issued:
30/06/2025 11:11:56
Start:
Wednesday 2 July
Finish:
end of Wednesday 2 July
Pollution Band:
Low
Details
Cooler and cloudier on Wednesday with the possibility of isolated showers. Temperatures nonetheless expected to be into the mid 20s.
The air feed is forecast to be mostly in off the North Sea and relatively 'clean'. Locally, a light breeze increasing later, should help prevent build-up of any pollution emissions.
Cloud cover and a relatively 'clean' air feed should slow down ozone formation and prevent levels from reaching 'Moderate'.
Air pollution is expected to remain 'Low' for the following pollutants:
PM10 Particulates
PM2.5 Particulates
Nitrogen Dioxide
Ozone
Sulphur Dioxide
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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