Table A12: 10 year Trend for O3 Winter Means (January-April, October-December) (English, CSV)

Load this English CSV resource into a live table: Table A12: 10 year Trend for O3 Winter Means (January-April, October-December).

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Publisher-reported update

2026-08-19

The Air Quality in Ontario Report summarizes the state of ambient air quality in 2015 and 10 year trends for key airborne pollutants affecting Ontario's air quality.

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