Air Quality Information / Alert Bulletin, 13th August 2026

News published: 13/08/2026

Persistent dry, hot and sunny weather has 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:

• Ladybower, 13/08/2026 19:00 BST, 181 ugm-3
• London Haringey Priory Park South, 13/08/2026 19:00 BST, 181 ugm-3
• Wicken Fen, 13/08/2026 19:00 BST, 183 ugm-3
• Chilbolton Observatory, 13/08/2026 18:00 BST, 181 ugm-3
• London Haringey Priory Park South, 13/08/2026 18:00 BST, 185 ugm-3
• London Honor Oak Park, 13/08/2026 18:00 BST, 191 ugm-3
• Yarner Wood, 13/08/2026 15:00 BST, 183 ugm-3
• London Haringey Priory Park South, 13/08/2026 17:00 BST, 191 ugm-3
• London Honor Oak Park, 13/08/2026 17:00 BST, 197 ugm-3
• London N. Kensington, 13/08/2026 17:00 BST, 194 ugm-3
• London Haringey Priory Park South, 13/08/2026 16:00 BST, 193 ugm-3
• London Honor Oak Park, 13/08/2026 16:00 BST, 195 ugm-3
• London N. Kensington, 13/08/2026 16:00 BST, 182 ugm-3
• Cwmbran Crownbridge, 13/08/2026 15:00 BST, 183 ugm-3
• London Haringey Priory Park South, 13/08/2026 15:00 BST, 192 ugm-3
• London Harlington, 13/08/2026 15:00 BST, 181 ugm-3
• London N. Kensington, 13/08/2026 14:00 BST, 181 ugm-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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