We measure wastewater treatment as the proportion of wastewater that undergoes at least primary treatment in each country, multiplied by the proportion of the population connected to a wastewater collection system. A score of 100 indicates that a country has 100% of its population connected to a sewer system and 100% of household wastewater is treated; a score of 0 indicates that no wastewater is reported as treated within a country. Data come from a wide variety of sources, especially the UN Statistics Division, the OECD, and Eurostat.
Wastewater treatment
| Country | Rank | EPI Score | 10-Year Change |
|---|---|---|---|
| Denmark | 1 | 100.00 | NA |
| Finland | 1 | 100.00 | NA |
| United Kingdom | 6 | 99.00 | NA |
| Switzerland | 8 | 97.00 | NA |
| Germany | 8 | 97.00 | NA |
| Austria | 10 | 94.00 | NA |
| Australia | 11 | 92.90 | NA |
| United Arab Emirates | 13 | 92.10 | NA |
| Spain | 14 | 91.10 | NA |
| Bahrain | 16 | 88.00 | NA |
| France | 16 | 88.00 | NA |
| Ireland | 18 | 87.00 | NA |
| Greece | 19 | 81.70 | NA |
| Israel | 19 | 81.70 | NA |
| Japan | 23 | 74.80 | NA |
| Chile | 24 | 71.90 | NA |
| Estonia | 25 | 70.40 | NA |
| Croatia | 28 | 69.00 | NA |
| Belgium | 29 | 68.20 | NA |
| Canada | 30 | 67.40 | NA |
| Czech Republic | 32 | 61.50 | NA |
| Italy | 36 | 58.80 | NA |
| Belarus | 37 | 55.80 | NA |
| Hungary | 38 | 55.30 | NA |
| Brazil | 39 | 52.40 | NA |
| Cyprus | 41 | 50.00 | NA |
| Georgia | 42 | 46.60 | NA |
| Egypt | 46 | 42.00 | NA |
| Algeria | 51 | 33.10 | NA |
| Kazakhstan | 53 | 27.50 | NA |
| Colombia | 54 | 25.90 | NA |
| Cabo Verde | 57 | 24.70 | NA |
| Jordan | 62 | 18.60 | NA |
| Bahamas | 64 | 17.40 | NA |
| Antigua and Barbuda | 65 | 15.70 | NA |
| Iceland | 66 | 15.30 | NA |
| Grenada | 67 | 15.10 | NA |
| Bulgaria | 71 | 13.90 | NA |
| Iraq | 74 | 13.10 | NA |
| Comoros | 77 | 10.10 | NA |
| Benin | 79 | 9.60 | NA |
| China | 80 | 9.40 | NA |
| Republic of Congo | 82 | 8.80 | NA |
| Kyrgyzstan | 83 | 8.60 | NA |
| Gambia | 85 | 7.90 | NA |
| Costa Rica | 86 | 7.20 | NA |
| Haiti | 87 | 7.10 | NA |
| Guatemala | 88 | 6.80 | NA |
| Argentina | 91 | 5.90 | NA |
| Brunei Darussalam | 92 | 5.80 | NA |
| Dominican Republic | 92 | 5.80 | NA |
| Armenia | 96 | 4.50 | NA |
| Azerbaijan | 100 | 3.90 | NA |
| Fiji | 100 | 3.90 | NA |
| Iran | 103 | 3.70 | NA |
| Bolivia | 104 | 3.50 | NA |
| Honduras | 106 | 3.10 | NA |
| Ghana | 107 | 3.00 | NA |
| Jamaica | 107 | 3.00 | NA |
| India | 112 | 2.20 | NA |
| Albania | 115 | 1.90 | NA |
| Cuba | 117 | 1.70 | NA |
| Cote d'Ivoire | 118 | 1.20 | NA |
| Equatorial Guinea | 118 | 1.20 | NA |
| Bosnia and Herzegovina | 121 | 1.10 | NA |
| Kenya | 121 | 1.10 | NA |
| Botswana | 123 | 0.90 | NA |
| Dominica | 123 | 0.90 | NA |
| Belize | 132 | 0.40 | NA |
| Dem. Rep. Congo | 137 | 0.10 | NA |
| Ethiopia | 137 | 0.10 | NA |
| Afghanistan | 141 | NA | NA |
| Angola | 141 | NA | NA |
| Burundi | 141 | NA | NA |
| Burkina Faso | 141 | NA | NA |
| Bangladesh | 141 | NA | NA |
| Barbados | 141 | NA | NA |
| Bhutan | 141 | NA | NA |
| Central African Republic | 141 | NA | NA |
| Cameroon | 141 | NA | NA |
| Djibouti | 141 | NA | NA |
| Ecuador | 141 | NA | NA |
| Eritrea | 141 | NA | NA |
| Micronesia | NA | NA | NA |
| Netherlands | 1 | 100.00 | NA |
| Luxembourg | 7 | 98.00 | NA |
| Latvia | 15 | 90.70 | NA |
| New Zealand | 21 | 79.90 | NA |
| South Korea | 22 | 76.80 | NA |
| Norway | 31 | 64.30 | NA |
| Poland | 32 | 61.50 | NA |
| Portugal | 34 | 59.20 | NA |
| Lithuania | 40 | 52.30 | NA |
| Kuwait | 44 | 43.10 | NA |
| Peru | 47 | 41.00 | NA |
| Lebanon | 48 | 38.20 | NA |
| Mexico | 56 | 25.20 | NA |
| Panama | 58 | 23.10 | NA |
| Mozambique | 60 | 20.00 | NA |
| Saint Lucia | 69 | 14.00 | NA |
| Oman | 72 | 13.40 | NA |
| Malaysia | 75 | 12.60 | NA |
| Moldova | 81 | 9.20 | NA |
| Montenegro | 84 | 8.40 | NA |
| Morocco | 94 | 5.40 | NA |
| Namibia | 95 | 5.00 | NA |
| Kiribati | 96 | 4.50 | NA |
| Maldives | 102 | 3.80 | NA |
| Mongolia | 105 | 3.30 | NA |
| Mauritius | 111 | 2.80 | NA |
| North Macedonia | 126 | 0.80 | NA |
| Lesotho | 134 | 0.30 | NA |
| Nigeria | 136 | 0.20 | NA |
| Laos | 141 | NA | NA |
| Liberia | 141 | NA | NA |
| Sri Lanka | 141 | NA | NA |
| Madagascar | 141 | NA | NA |
| Marshall Islands | NA | NA | NA |
| Singapore | 1 | 100.00 | NA |
| Sweden | 1 | 100.00 | NA |
| Slovenia | 12 | 92.20 | NA |
| Qatar | 26 | 70.00 | NA |
| Eswatini | 26 | 70.00 | NA |
| United States of America | 35 | 58.90 | NA |
| Slovakia | 43 | 44.70 | NA |
| Tunisia | 45 | 43.00 | NA |
| Saudi Arabia | 49 | 37.70 | NA |
| Zimbabwe | 50 | 37.20 | NA |
| Turkey | 52 | 30.50 | NA |
| Romania | 55 | 25.70 | NA |
| South Africa | 59 | 21.70 | NA |
| Seychelles | 61 | 19.50 | NA |
| Russia | 63 | 18.50 | NA |
| Ukraine | 68 | 14.10 | NA |
| Saint Vincent and the Grenadines | 69 | 14.00 | NA |
| Suriname | 73 | 13.20 | NA |
| Sao Tome and Principe | 76 | 10.90 | NA |
| Turkmenistan | 78 | 9.80 | NA |
| Taiwan | 89 | 6.50 | NA |
| Venezuela | 90 | 6.40 | NA |
| Vanuatu | 96 | 4.50 | NA |
| Zambia | 96 | 4.50 | NA |
| Trinidad and Tobago | 107 | 3.00 | NA |
| Tanzania | 110 | 2.90 | NA |
| Tajikistan | 112 | 2.20 | NA |
| Uruguay | 114 | 2.10 | NA |
| Thailand | 116 | 1.80 | NA |
| Solomon Islands | 118 | 1.20 | NA |
| Samoa | 123 | 0.90 | NA |
| Philippines | 126 | 0.80 | NA |
| Paraguay | 128 | 0.70 | NA |
| Serbia | 128 | 0.70 | NA |
| Timor-Leste | 130 | 0.60 | NA |
| Senegal | 131 | 0.50 | NA |
| Uganda | 132 | 0.40 | NA |
| Viet Nam | 134 | 0.30 | NA |
| Pakistan | 137 | 0.10 | NA |
| El Salvador | 137 | 0.10 | NA |
| Gabon | 141 | NA | NA |
| Guinea | 141 | NA | NA |
| Guinea-Bissau | 141 | NA | NA |
| Guyana | 141 | NA | NA |
| Indonesia | 141 | NA | NA |
| Cambodia | 141 | NA | NA |
| Mali | 141 | NA | NA |
| Malta | 141 | NA | NA |
| Myanmar | 141 | NA | NA |
| Mauritania | 141 | NA | NA |
| Malawi | 141 | NA | NA |
| Niger | 141 | NA | NA |
| Nicaragua | 141 | NA | NA |
| Nepal | 141 | NA | NA |
| Papua New Guinea | 141 | NA | NA |
| Rwanda | 141 | NA | NA |
| Sudan | 141 | NA | NA |
| Sierra Leone | 141 | NA | NA |
| Chad | 141 | NA | NA |
| Togo | 141 | NA | NA |
| Tonga | NA | NA | NA |
| Uzbekistan | 141 | NA | NA |