Original metadata (https://data.ontario.ca) (English, HTML)

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Publisher-reported update

2026-08-05

The ministry monitors air pollution levels and issues smog advisories when there is strong likelihood that widespread, elevated, and persistent smog levels are expected. This dataset provides a comprehensive summary in excel file format. The dataset includes the forecasts for the regions where a smog advisory was issued and the duration of the advisory for each year. The Smog Advisory Statistics page has been archived and is no longer updated. See Air Quality Alerts for current updates

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