Table 5.
Estimation of infectious persons in the population served by WWTP and Correlation with reported COVID-19 cases
| WWTP | Week | Consecutive samples | Average dry weather flow capacity | Population served by WWTP | Average reported COVID-19 | Average SARS-CoV-2 GC/100 mL | No. of infectious person | |
|---|---|---|---|---|---|---|---|---|
| Method 1 (Ahmed et al., 2020) | Method 2 (Hemalatha et al., 2021) | |||||||
| WWTP-Z3* |
Week 1 06/04/21–08/04/21 |
3 | 81 | 449,200 | 361 | 2.17E + 05 | 137,602 | 146,775 |
|
Week 2 12/04/21–15/04/21 |
4 | 332 | 1.70E + 05 | 107,736 | 114,919 | |||
|
Week 3 03/05/21–07/05/21 |
5 | 112 | 1.61E + 05 | 102,149 | 108,959 | |||
|
Week 4 10/05/21–14/05/21 |
5 | 97 | 3.72E + 04 | 23,545 | 25,115 | |||
|
Week 5 24/05/21–28/05/21 |
5 | 62 | 4.48E + 04 | 28,341 | 30,231 | |||
|
Week 6 31/05/21–04/06/21 |
5 | 38 | 2.53E + 04 | 16,002 | 17,069 | |||
| WWTP-Z5* |
Week 1 06/04/21–08/04/21 |
3 | 5 | 27,814 | 533 | 6.26E + 05 | 24,444 | 26,074 |
|
Week 2 12/04/21–13/04/21 |
2 | 386 | 6.76E + 05 | 26,406 | 28,167 | |||
|
Week 3 03/05/21–07/05/21 |
5 | 193 | 5.67E + 05 | 22,143 | 23,619 | |||
|
Week 4 10/05/21–14/05/21 |
5 | 118 | 2.56E + 05 | 7990 | 8523 | |||
|
Week 5 24/05/21–28/05/21 |
5 | 64 | 1.60E + 04 | 626 | 668 | |||
|
Week 6 07/06/21–08/06/21 |
2 | 55 | 0 | 0 | 0 | |||
| WWTP-Z1 |
Week 1 20/05/21–21/05/21 |
2 | 36 | 110,916 | 29 | 0 | 0 | 0 |
|
Week 2 24/05/21–28/05/21 |
5 | 13 | 7.77E + 04 | 23,296 | 22,496 | |||
|
Week 3 31/05/21–4/06/21 |
5 | 7 | 5.80E + 04 | 17,410 | 15,810 | |||
|
Week 4 07/06/21–08/06/21 |
2 | 5 | 0 | 0 | 0 | |||
*Significant association between average COVID-19 reported clinical cases versus SARS-CoV-2 GC/100 mL and no. of infectious persons (p < 0.05)