| Macro Region |
| Africa | 391 timeseries | |
| Asia | 154 timeseries | |
| Central America and the Caribbean | 95 timeseries | |
| Europe | 260 timeseries | |
| Middle East | 80 timeseries | |
| North America | 99.86 % in 2020 | WB |
| Oceania | 99 timeseries | |
| South America | 101 timeseries | |
| Southeast Asia | 99 timeseries |
| Country (%) |
| Afghanistan | 36.38 in 2022 | WHO + 1 other |
| Albania | 87.33 in 2022 | WHO + 1 other |
| Algeria | 73.11 in 2022 | WHO + 1 other |
| Andorra | 99 in 2022 | WHO + 1 other |
| Angola | 54.74 in 2022 | WHO + 1 other |
| Antigua and Barbuda Water Supplies | 3 timeseries | |
| Argentina | 98.49 in 2015 | WHO + 1 other |
| Armenia | 99 in 2022 | WHO + 1 other |
| Australia | 99 in 2022 | WHO + 1 other |
| Austria | 99 in 2022 | WHO + 1 other |
| Azerbaijan | 92.28 in 2022 | WHO + 1 other |
| Bangladesh | 54.19 in 2022 | WHO + 1 other |
| Belarus | 99 in 2022 | WHO + 1 other |
| Belgium | 99 in 2022 | WHO + 1 other |
| Belize | 98.22 in 2022 | WHO + 1 other |
| Benin | 43.58 in 2022 | WHO + 1 other |
| Bhutan | 58.86 in 2022 | WHO + 1 other |
| Bolivia | 96.45 in 2022 | WHO + 1 other |
| Bosnia and Herzegovina | 89.87 in 2022 | WHO + 1 other |
| Botswana | 72.94 in 2022 | WHO + 1 other |
| Brazil | 88.86 in 2022 | WHO + 1 other |
| Brunei Darussalam | 99 in 2020 | WHO + 1 other |
| Bulgaria | 99 in 2022 | WHO + 1 other |
| Burkina Faso | 59.41 in 2022 | WHO + 1 other |
| Burundi | 58.47 in 2022 | WHO + 1 other |
| Cabo Verde | 93.21 in 2022 | WHO + 1 other |
| Cambodia | 57.5 in 2022 | WHO + 1 other |
| Cameroon | 56.45 in 2022 | WHO + 1 other |
| Canada | 99 in 2022 | WHO + 1 other |
| Central African Republic | 11.25 in 2022 | WHO + 1 other |
| Chad | 17.59 in 2022 | WHO + 1 other |
| Chile | 99 in 2022 | WHO + 1 other |
| China | 97.87 in 2022 | WHO + 1 other |
| Colombia | 81.22 in 2022 | WHO + 1 other |
| Comoros | 71.47 in 2019 | WHO + 1 other |
| Congo | 58.63 in 2021 | WHO + 1 other |
| Costa Rica | 80.39 in 2022 | WHO + 1 other |
| Côte d'Ivoire | 58.77 in 2022 | WHO + 1 other |
| Croatia | 96.55 in 2022 | WHO + 1 other |
| Cuba | 93.48 in 2022 | WHO + 1 other |
| Cyprus | 99 in 2022 | WHO + 1 other |
| Czech Republic | 97.96 in 2022 | WHO + 1 other |
| Democratic People's Republic of Korea | 76.96 in 2022 | WHO + 1 other |
| Democratic Republic of the Congo | 24.15 in 2022 | WHO + 1 other |
| Denmark | 96.6 in 2020 | WHO + 1 other |
| Djibouti | 58.17 in 2022 | WHO + 1 other |
| Dominican Republic | 46.88 in 2022 | WHO + 1 other |
| Ecuador | 74.65 in 2022 | WHO + 1 other |
| Egypt | 98.38 in 2022 | WHO + 1 other |
| El Salvador | 78.57 in 2022 | WHO + 1 other |
| Equatorial Guinea | 22.52 in 2017 | WHO + 1 other |
| Eritrea | 74.34 in 2016 | WHO + 1 other |
| Estonia | 98.7 in 2022 | WHO + 1 other |
| Eswatini | 77.53 in 2022 | WHO + 1 other |
| Ethiopia | 38.58 in 2022 | WHO + 1 other |
| Falkland Islands Water Supplies | 3 timeseries | |
| Fiji | 52.52 in 2022 | WHO + 1 other |
| Finland | 99 in 2022 | WHO + 1 other |
| France | 99 in 2022 | WHO + 1 other |
| Gabon | 76.63 in 2022 | WHO + 1 other |
| Gambia | 67.77 in 2022 | WHO + 1 other |
| Georgia | 87.98 in 2022 | WHO + 1 other |
| Germany | 99 in 2022 | WHO + 1 other |
| Ghana | 62.56 in 2022 | WHO + 1 other |
| Greece | 99 in 2022 | WHO + 1 other |
| Guatemala | 65.54 in 2022 | WHO + 1 other |
| Guinea | 70.43 in 2022 | WHO + 1 other |
| Guinea Bissau | 36.27 in 2022 | WHO + 1 other |
| Guyana | 83.8 in 2022 | WHO + 1 other |
| Haiti | 8.13 in 2022 | WHO + 1 other |
| Honduras | 78.44 in 2022 | WHO + 1 other |
| Hong Kong | 99 in 2022 | WHO + 1 other |
| Hungary | 99 in 2022 | WHO + 1 other |
| Iceland | 99 in 2022 | WHO + 1 other |
| India | 82.39 in 2022 | WHO + 1 other |
| Indonesia | 34.63 in 2022 | WHO + 1 other |
| Iran | 96.19 in 2022 | WHO + 1 other |
| Iraq | 64.6 in 2022 | WHO + 1 other |
| Ireland | 95.41 in 2022 | WHO + 1 other |
| Israel | 99 in 2022 | WHO + 1 other |
| Italy | 97.6 in 2017 | WHO + 1 other |
| Jamaica | 93.32 in 2022 | WHO + 1 other |
| Jordan | 98.63 in 2022 | WHO + 1 other |
| Kazakhstan | 93.66 in 2022 | WHO + 1 other |
| Kenya | 57.7 in 2020 | WHO + 1 other |
| Kiribati | 20.37 in 2022 | WHO + 1 other |
| Kuwait Water Supplies | 4 timeseries | |
| Kyrgyzstan | 91.85 in 2022 | WHO + 1 other |
| Lao People’s Democratic Republic | 26.99 in 2022 | WHO + 1 other |
| Latvia | 98.88 in 2022 | WHO + 1 other |
| Lesotho | 72.61 in 2022 | WHO + 1 other |
| Liberia | 28.22 in 2022 | WHO + 1 other |
| Lithuania | 99 in 2022 | WHO + 1 other |
| Luxembourg | 99 in 2022 | WHO + 1 other |
| Macau | 99 in 2022 | WHO + 1 other |
| Madagascar | 41.29 in 2022 | WHO + 1 other |
| Malawi | 52.37 in 2022 | WHO + 1 other |
| Malaysia | 97.25 in 2022 | WHO + 1 other |
| Maldives | 99 in 2022 | WHO + 1 other |
| Mali | 70.77 in 2022 | WHO + 1 other |
| Malta | 99 in 2022 | WHO + 1 other |
| Marshall Islands | 79.32 in 2022 | WHO + 1 other |
| Mauritania | 84.33 in 2022 | WHO + 1 other |
| Mauritius | 99 in 2022 | WHO + 1 other |
| Mexico | 98.35 in 2022 | WHO + 1 other |
| Micronesia (Federated States of) | 70.86 in 2015 | WHO + 1 other |
| Monaco | 99 in 2022 | WHO + 1 other |
| Mongolia | 51.25 in 2022 | WHO + 1 other |
| Montenegro | 87.32 in 2022 | WHO + 1 other |
| Morocco | 90.26 in 2022 | WHO + 1 other |
| Mozambique | 64.71 in 2022 | WHO + 1 other |
| Myanmar | 72.4 in 2022 | WHO + 1 other |
| Namibia | 74.87 in 2022 | WHO + 1 other |
| Nauru | 99 in 2020 | WHO + 1 other |
| Nepal | 23.16 in 2022 | WHO + 1 other |
| Netherlands | 99 in 2022 | WHO + 1 other |
| New Zealand | 99 in 2022 | WHO + 1 other |
| Nicaragua | 67.3 in 2020 | WHO + 1 other |
| Niger | 66.85 in 2022 | WHO + 1 other |
| Nigeria | 35.73 in 2022 | WHO + 1 other |
| North Macedonia | 84.61 in 2022 | WHO + 1 other |
| Norway | 99 in 2022 | WHO + 1 other |
| Oman | 93.3 in 2022 | WHO + 1 other |
| Pakistan | 56.78 in 2022 | WHO + 1 other |
| Palau | 97.7 in 2022 | WHO + 1 other |
| Palestine | 81.49 in 2022 | WHO + 1 other |
| Panama | 97.92 in 2022 | WHO + 1 other |
| Papua New Guinea | 86.53 in 2022 | WHO + 1 other |
| Paraguay | 72.21 in 2022 | WHO + 1 other |
| Peru | 59.82 in 2022 | WHO + 1 other |
| Philippines | 61.91 in 2022 | WHO + 1 other |
| Poland | 94.54 in 2022 | WHO + 1 other |
| Portugal | 97.08 in 2022 | WHO + 1 other |
| Republic of Moldova | 88.83 in 2022 | WHO + 1 other |
| Romania | 94.95 in 2022 | WHO + 1 other |
| Russian Federation | 82.92 in 2022 | WHO + 1 other |
| Rwanda | 54.59 in 2022 | WHO + 1 other |
| Saint Lucia | 93.63 in 2022 | WHO + 1 other |
| Saint Vincent and the Grenadines Water Supplies | 4 timeseries | |
| Samoa | 90.19 in 2022 | WHO + 1 other |
| Sao Tome and Principe | 40.3 in 2022 | WHO + 1 other |
| Saudi Arabia Water Supplies | 2 timeseries | |
| Senegal | 41.26 in 2022 | WHO + 1 other |
| Serbia | 81.52 in 2022 | WHO + 1 other |
| Sierra Leone | 12.25 in 2022 | WHO + 1 other |
| Singapore | 99 in 2022 | WHO + 1 other |
| Slovakia | 99 in 2022 | WHO + 1 other |
| Slovenia | 98.29 in 2017 | WHO + 1 other |
| Solomon Islands | 83.42 in 2021 | WHO + 1 other |
| Somalia | 68.94 in 2022 | WHO + 1 other |
| South Africa | 80.48 in 2022 | WHO + 1 other |
| South Sudan | 3.66 in 2022 | WHO + 1 other |
| Spain | 99 in 2022 | WHO + 1 other |
| Sri Lanka | 83 in 2022 | WHO + 1 other |
| Sudan | 64.42 in 2022 | WHO + 1 other |
| Suriname | 63.41 in 2022 | WHO + 1 other |
| Sweden | 99 in 2022 | WHO + 1 other |
| Switzerland | 99 in 2022 | WHO + 1 other |
| Syrian Arab Republic | 92.12 in 2022 | WHO + 1 other |
| Tajikistan | 90.31 in 2022 | WHO + 1 other |
| Thailand | 99 in 2022 | WHO + 1 other |
| Timor-Leste | 94.3 in 2022 | WHO + 1 other |
| Togo | 33.86 in 2022 | WHO + 1 other |
| Tonga | 50.78 in 2022 | WHO + 1 other |
| Tunisia | 77.37 in 2022 | WHO + 1 other |
| Turkey | 94.18 in 2022 | WHO + 1 other |
| Turkmenistan | 97.08 in 2022 | WHO + 1 other |
| Tuvalu | 10.47 in 2022 | WHO + 1 other |
| Uganda | 45.09 in 2022 | WHO + 1 other |
| Ukraine | 88.27 in 2022 | WHO + 1 other |
| United Arab Emirates | 98.75 in 2022 | WHO + 1 other |
| United Kingdom | 99 in 2022 | WHO + 1 other |
| United Republic of Tanzania | 25.48 in 2022 | WHO + 1 other |
| United States of America | 97.59 in 2022 | WHO + 1 other |
| Uruguay | 94.59 in 2022 | WHO + 1 other |
| Uzbekistan | 88.78 in 2022 | WHO + 1 other |
| Vanuatu | 56.26 in 2022 | WHO + 1 other |
| Venezuela (Bolivarian Republic of) | 92.82 in 2015 | WHO + 1 other |
| Viet Nam | 75.77 in 2022 | WHO + 1 other |
| Yemen | 74.48 in 2022 | WHO + 1 other |
| Zambia | 45.48 in 2022 | WHO + 1 other |
| Zimbabwe | 55.49 in 2022 | WHO + 1 other |
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