Air Quality Information / Alert Bulletin, 25th June 2026

News published: 25/06/2026

Persistent dry 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:

• Eastbourne, 25/06/2026 17:00 BST, 182 ugm-3
• Reading New Town, 25/06/2026 17:00 BST, 183 ugm-3
• Swindon Walcot, 25/06/2026 17:00 BST, 191 ugm-3
• Yarner Wood, 25/06/2026 17:00 BST, 195 ugm-3
• Swindon Walcot, 25/06/2026 16:00 BST, 192 ugm-3
• Yarner Wood, 25/06/2026 16:00 BST, 187 ugm-3
• Swindon Walcot, 25/06/2026 15:00 BST, 188 ugm-3
• Yarner Wood, 25/06/2026 15:00 BST, 193 ugm-3
• Yarner Wood, 25/06/2026 14:00 BST, 189 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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