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. 2021 Feb 17;413:125445. doi: 10.1016/j.jhazmat.2021.125445

Table 1.

Summary of the percentage decrease in pollutant levels in 2020 relative to the same period in 2017–2019. The statistically significant values are highlighted in p-values below 0.05 listed in parentheses.

Image 1

Notes: a See Fig. 3 for location. b 2016 Census (Statistics Canada, 2016) c % decrease in 2020 in a given month = (median in 2020 – median in 2017–2019) * 100% / (median in 2017–2019). ‘n.o.’ = no decrease observed, on the other hand, an increase was observed in pollutant level in 2020 relative to 2017–2019.