Figure 14.1.4 Ground-level ozone annual average concentration
Ground-level ozone (O3) annual average concentration (ppb) by year, London, 2008 to 2017
![Figure 14.1.4 Ground-level ozone annual average concentration Figure 14.1.4 Ground-level ozone annual average concentration](https://communityhealthstats.healthunit.com/sites/default/files/styles/chart_image_large/public/charts/Figure%2014.1.4%20Ozone%20ann%20avg.png?itok=RyJwk3zz)
Source:
Ontario Ministry of the Environment, Conservation and Parks. Air quality in Ontario 2017 Report [Internet]. Toronto (ON): Queen’s Printer for Ontario; 2017 [updated 2019 Jun 20; cited 2019 Oct 28]. Available at https://www.ontario.ca/document/air-quality-ontario-2017-reportIn London, the annual average concentration of ground-level ozone fluctuated between 25.1 ppb and 28.7 ppb in the 10 years between 2008 and 2017. In general, the annual average concentration increased across the 10-year time period.