The following websites provide information on the level of ozone pollution in your local area. If you notice that levels are high, it would be a good time to go and look for incidences of ozone injury on vegetation and submit the records using the ozone injury smart phone App or online recording form!
UK: http://uk-air.defra.gov.uk/latest/currentlevels
Europe: https://www.eea.europa.eu/data-and-maps/explore-interactive-maps/up-to-date-air-quality-data
Worldwide: http://aqicn.org/map/world/
