الصرف الصحي المُشترك (%) (النسبة المئوية)
| 2000 | 2005 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 |
| السنغال | 5.9 | 7.2 | 8.1 | 8.3 | 8.5 | 8.6 | 8.8 | 8.9 | 9.0 | 9.1 | 9.2 | 9.3 | 9.4 | 9.5 | 9.6 |
| مالي | 5.8 | 7.9 | 8.9 | 9.0 | 9.1 | 9.1 | 9.0 | 9.0 | 8.9 | 8.7 | 8.5 | 8.3 | 8.1 | 7.7 | 7.4 |
| ساحل العاج | 9.6 | 12.6 | 15.0 | 15.4 | 15.8 | 16.3 | 16.6 | 17.0 | 17.4 | 17.7 | 18.1 | 18.4 | 18.7 | 19.3 | 19.8 |
| النيجر | 1.0 | 1.6 | 2.8 | 3.0 | 3.3 | 3.6 | 3.9 | 4.1 | 4.4 | 4.7 | 5.1 | 5.4 | 5.7 | 5.9 | 6.2 |
| نيجيريا | 15.1 | 13.5 | 11.6 | 11.2 | 10.8 | 10.5 | 10.1 | 9.7 | 9.4 | 9.0 | 8.6 | 8.3 | 7.9 | 7.5 | 7.2 |
| بوركينا فاسو | 2.7 | 7.0 | 12.4 | 13.5 | 14.6 | 15.7 | 16.9 | 18.0 | 19.1 | 20.3 | 21.4 | 22.6 | 23.8 | 24.9 | 25.9 |
| بنين | 5.6 | 7.4 | 8.9 | 9.2 | 9.5 | 9.7 | 10.0 | 10.2 | 10.4 | 10.6 | 10.8 | 11.0 | 11.1 | 11.1 | 11.1 |
| كابو فيردي | 1.2 | 2.0 | 2.8 | 2.9 | 2.9 | 2.8 | 2.7 | 2.5 | 2.3 | 2.2 | 1.9 | 1.7 | 1.4 | 1.1 | 1.1 |
| جامبيا | 21.5 | 18.4 | 15.2 | 14.6 | 13.9 | 13.3 | 12.7 | 12.1 | 11.5 | 10.9 | 10.3 | 9.7 | 9.1 | 8.5 | 7.9 |
| غينيا بيساو | 1.0 | 1.0 | 3.1 | 3.5 | 4.0 | 4.4 | 4.8 | 5.2 | 5.6 | 6.0 | 6.4 | 6.8 | 7.2 | 7.6 | 7.6 |
| توجو | 6.6 | 8.2 | 9.1 | 9.3 | 9.4 | 9.5 | 9.6 | 9.7 | 9.8 | 9.9 | 10.0 | 10.0 | 10.1 | 10.1 | 10.1 |
| غانا | 37.0 | 37.8 | 37.3 | 37.2 | 37.0 | 36.8 | 36.6 | 36.3 | 36.1 | 35.8 | 35.4 | 35.1 | 34.7 | 34.3 | 33.9 |
| ليبيريا | 14.5 | 15.8 | 16.1 | 16.1 | 16.1 | 16.1 | 16.1 | 16.1 | 16.1 | 16.1 | 16.0 | 16.0 | 16.0 | 15.9 | 15.9 |
| سيراليون | 14.4 | 17.8 | 20.2 | 20.6 | 21.0 | 21.4 | 21.8 | 22.1 | 22.5 | 22.8 | 23.1 | 23.3 | 23.6 | 23.9 | 24.1 |