| South America (%) |
| Argentina | 98.49 in 2015 | WHO + 1 other |
| Bolivia | 96.45 in 2022 | WHO + 1 other |
| Brazil | 88.86 in 2022 | WHO + 1 other |
| Chile | 99 in 2022 | WHO + 1 other |
| Colombia | 81.22 in 2022 | WHO + 1 other |
| Ecuador | 74.65 in 2022 | WHO + 1 other |
| Falkland Islands Water Supplies | 3 timeseries | |
| Guyana | 83.8 in 2022 | WHO + 1 other |
| Paraguay | 72.21 in 2022 | WHO + 1 other |
| Peru | 59.82 in 2022 | WHO + 1 other |
| Suriname | 63.41 in 2022 | WHO + 1 other |
| Uruguay | 94.59 in 2022 | WHO + 1 other |
| Venezuela (Bolivarian Republic of) | 92.82 in 2015 | WHO + 1 other |
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