Air Quality Information / Alert Bulletin, 19th June 2025

News published: 19/06/2025

Dry and sunny weather along with light winds have resulted in increased levels of pollution in some UK locations. Pollution alert thresholds have been exceeded at the following locations:

UK ozone public information threshold of 180 µgm-3:

London Bloomsbury	19/06/2025	16:00 BST	181 µgm-3
London N. Kensington	19/06/2025	16:00 BST	188 µgm-3
London Bloomsbury	19/06/2025	17:00 BST	183 µgm-3
London Honor Oak Park	19/06/2025	17:00 BST	181 µgm-3
London N. Kensington	19/06/2025	17:00 BST	192 µgm-3
London Honor Oak Park	19/06/2025	18:00 BST	200 µgm-3
London N. Kensington	19/06/2025	18:00 BST	182 µgm-3
Reading New Town	19/06/2025	19:00 BST	182 µgm-3
London Harlington	19/06/2025	18:00 BST	193 µgm-3
London Harlington	19/06/2025	19:00 BST	186 µgm-3

For more information, air quality forecasts, latest measurements and health advice are available on UK-AIR. Updates on current and forecast levels of air pollution can also be found on X (@DefraUKAir). The UK Health Security Agency advises that some people are more sensitive to pollution than others and may begin to notice an effect on their breathing. People with asthma are not necessarily more sensitive but, if affected, can use their reliever inhaler to alleviate symptoms. If affected, people are urged to take sensible precautions. In particular, avoiding exercise outdoors in the afternoon can reduce individual exposure to ozone.

Further information about health impacts can be found on the UK Air website. https://uk-air.defra.gov.uk/air-pollution/daqi

If the pollution information or alert thresholds are again breached, further alerts will be issued on our UK Air website http://uk-air.defra.gov.uk/.

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