10-year trend of Annual SO₂ CAAQS metrics in Ontario
10-year trend of annual SO₂ CAAQS metrics in Ontario| Year | Annual SO₂ CAAQS Metric |
|---|
| 2013 | 2.3 ppb |
| 2014 | 2.3 ppb |
| 2015 | 2.1 ppb |
| 2016 | 1.3 ppb |
| 2017 | 1.3 ppb |
| 2018 | 1.6 ppb |
| 2019 | 1.6 ppb |
| 2020 | 1.3 ppb |
| 2021 | 1.5 ppb |
| 2022 | 1.5 ppb |