The number of air quality advisories issued in British Columbia per year. 2023 data as of Sept. 18. 2017 had 625 advisories. 2018 had 462 advisories.] 2019 had 134 advisories. 2020 had 122 advisories. 2021 had 235 advisories. 2022 had 246 advisories. 2023 had 345 advisories.