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We describe anticipated air quality in Paris based on historical monitoring data and describe the impact of the process on the development of monitoring strategies for future international sporting events.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Air pollutant data for July to September 2020\u20132023 and pollen data for 2015\u20132022 were provided by Airparif (particulate matter (PM<jats:sub>2.5<\/jats:sub>), nitrogen dioxide (NO<jats:sub>2<\/jats:sub>) and ozone (O<jats:sub>3<\/jats:sub>)) and RNSA stations in the Paris region. Airparif\u2019s street-level numerical modelling provided spatial data for the OPG venues.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The maximum daily mean PM<jats:sub>2.5<\/jats:sub>was 11\u00b16\u2009\u00b5g\/m<jats:sup>3<\/jats:sup>at traffic stations, below the WHO recommended daily air quality threshold (AQT). Daily NO<jats:sub>2<\/jats:sub>concentrations ranged from 5\u00b13\u2009\u00b5g\/m<jats:sup>3<\/jats:sup>in rural areas to 17\u00b114\u2009\u00b5gm<jats:sup>3<\/jats:sup>in urban areas. Near traffic stations, this rose to 40\u00b124\u2009\u00b5g\/m<jats:sup>3<\/jats:sup>exceeding the WHO AQT. Both peaked around 06:00 and 20:00 UTC (coordinated universal time). The ambient O<jats:sub>3<\/jats:sub>level exceeded the AQT on 20 days per month and peaked at 14:00 UTC. The main allergenic taxa from June to September was Poaceae (ie, grass pollen variety).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Air pollutant levels are expected to be within accepted air quality thresholds at the Paris OPG. However, O<jats:sub>3<\/jats:sub>concentrations may be significantly raised in very hot and clear conditions and grass pollen levels will be high, prompting a need to consider and manage this risk in susceptible individuals.<\/jats:p><\/jats:sec>","DOI":"10.1136\/bjsports-2024-108129","type":"journal-article","created":{"date-parts":[[2024,7,25]],"date-time":"2024-07-25T23:55:11Z","timestamp":1721951711000},"page":"973-982","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":11,"title":["Paris air quality monitoring for the 2024 Olympics and Paralympics: focus on air pollutants and 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