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Volume 29, Number 8—August 2023
Research

Omicron COVID-19 Case Estimates Based on Previous SARS-CoV-2 Wastewater Load, Regional Municipality of Peel, Ontario, Canada

Lydia Cheng1, Hadi A. Dhiyebi1, Monali VariaComments to Author , Kyle Atanas, Nivetha Srikanthan, Samina Hayat, Heather Ikert, Meghan Fuzzen, Carly Sing-Judge, Yash Badlani, Eli Zeeb, Leslie M. Bragg, Robert Delatolla, John P. Giesy, Elaine Gilliland, and Mark R. Servos
Author affiliations: Regional Municipality of Peel, Mississauga, Ontario, Canada (L. Cheng, M. Varia, K. Atanas, E. Gilliland); University of Waterloo, Waterloo, Ontario, Canada (H.A. Dhiyebi, N. Srikanthan, S. Hayat, H. Ikert, M. Fuzzen, C. Sing-Judge, Y. Badlani, E. Zeeb, L.M. Bragg, M.R. Servos); University of Ottawa, Ottawa, Ontario, Canada (R. Delatolla); University of Saskatchewan, Saskatoon, Saskatchewan, Canada (J.P. Giesy); Baylor University, Waco, Texas, USA (J.P. Giesy)

Main Article

Table 2

Pearson correlation coefficients (r) between ln(x + 1) transformed daily wastewater SARS-CoV-2 load and ln(x + 1) transformed incident COVID-19 cases, by wastewater treatment plant and epidemic wave, at various lags, Regional Municipality of Peel, Ontario, Canada*

WWTP, lag, d Epidemic waves
2 3 4 5 6 2–6 2–4, 
pre-Omicron 5–6, Omicron
Clarkson
0 0.7078 0.8809 0.5747 0.7203 0.6655† 0.6273† 0.8677 0.5469†
1 0.7144† 0.8966 0.6661† 0.7248† 0.5933 0.6220 0.8864† 0.5384
2 0.6935 0.8901 0.5041 0.6607 0.5712 0.5849 0.8705 0.4743
3 0.6678 0.9089† 0.5321 0.6155 0.5480 0.5863 0.8788 0.4497
4 0.6653 0.9037 0.4539 0.5791 0.5468 0.5771 0.8727 0.4236
5
 0.6550
 0.8906
 0.5550
 0.5298
 0.5762
 0.5737
 0.8699
 0.4023
G.E. Booth
0 0.7173† 0.8993 0.5774† 0.7922† 0.7572† 0.6030† 0.8698† 0.6828†
1 0.6935 0.9068† 0.5167 0.7601 0.7227 0.5932 0.8696 0.6535
2 0.6714 0.8722 0.4735 0.7076 0.7251 0.5529 0.8452 0.6165
3 0.6466 0.8889 0.4923 0.6767 0.7314 0.5650 0.8559 0.5974
4 0.6575 0.8808 0.4425 0.6347 0.7144 0.5592 0.8492 0.5658
5
 0.6499
 0.8641
 0.4998
 0.5953
 0.7095
 0.5467
 0.8417
 0.5502
Clarkson and G.E. Booth
0 0.7647† 0.9422 0.6447† 0.7908† 0.7910† 0.6296† 0.9101 0.6601†
1 0.7431 0.9438† 0.6266 0.7655 0.7357 0.6150 0.9106† 0.6341
2 0.7290 0.9246 0.5295 0.7025 0.7276 0.5774 0.8921 0.5830
3 0.7087 0.9326 0.5505 0.6675 0.7186 0.5820 0.8972 0.5616
4 0.7121 0.9292 0.5051 0.6223 0.7017 0.5756 0.8931 0.5282
5 0.7057 0.9163 0.5706 0.5814 0.7111 0.5678 0.8887 0.5115

*Colors indicate strength of association: gray, weak (r<0.4); yellow, moderate (0.4≤r<0.7); green, strong (r>0.7). WWTP, wastewater treatment plant. †Largest r per wave.

Main Article

1These first authors contributed equally to this article.

Page created: June 22, 2023
Page updated: July 19, 2023
Page reviewed: July 19, 2023
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