| # | Flag | Country | PM2.5 air pollution, mean annual exposure (micrograms per cubic meter)PM2.5 air pollution, mean annual exposure (micrograms per cubic meter) | Year |
|---|---|---|---|---|
| 1 | Nepal | 99.00 | 2017 | |
| 2 | Niger | 94.00 | 2017 | |
| 3 | Qatar | 91.00 | 2017 | |
| 4 | India | 90.00 | 2017 | |
| 5 | Saudi Arabia | 87.00 | 2017 | |
| 6 | Egypt | 86.00 | 2017 | |
| 7 | Cameroon | 72.00 | 2017 | |
| 8 | Nigeria | 71.00 | 2017 | |
| 9 | Bahrain | 70.00 | 2017 | |
| 10 | Chad | 66.00 | 2017 | |
| 11 | Iraq | 61.00 | 2017 | |
| 12 | Kuwait | 60.00 | 2017 | |
| 13 | Bangladesh | 60.00 | 2017 | |
| 14 | Pakistan | 58.00 | 2017 | |
| 15 | Central African Republic | 56.00 | 2017 | |
| 16 | Afghanistan | 56.00 | 2017 | |
| 17 | Sudan | 55.00 | 2017 | |
| 18 | Libya | 54.00 | 2017 | |
| 19 | Equatorial Guinea | 53.00 | 2017 | |
| 20 | China | 52.00 | 2017 | |
| 21 | Uganda | 50.00 | 2017 | |
| 22 | Yemen | 50.00 | 2017 | |
| 23 | Eritrea | 48.00 | 2017 | |
| 24 | Mauritania | 47.00 | 2017 | |
| 25 | Republic of the Congo | 46.00 | 2017 | |
| 26 | Tajikistan | 46.00 | 2017 | |
| 27 | Djibouti | 45.00 | 2017 | |
| 28 | South Sudan | 45.00 | 2017 | |
| 29 | Gabon | 44.00 | 2017 | |
| 30 | Turkey | 44.00 | 2017 | |
| 31 | Democratic Republic Of Congo | 44.00 | 2017 | |
| 32 | Rwanda | 43.00 | 2017 | |
| 33 | Syria | 43.00 | 2017 | |
| 34 | Burkina Faso | 42.00 | 2017 | |
| 35 | Oman | 41.00 | 2017 | |
| 36 | Mongolia | 40.00 | 2017 | |
| 37 | Senegal | 40.00 | 2017 | |
| 38 | United Arab Emirates | 40.00 | 2017 | |
| 39 | Burundi | 38.00 | 2017 | |
| 40 | Benin | 38.00 | 2017 | |
| 41 | Mali | 38.00 | 2017 | |
| 42 | Ethiopia | 38.00 | 2017 | |
| 43 | Algeria | 38.00 | 2017 | |
| 44 | Iran | 38.00 | 2017 | |
| 45 | Bhutan | 37.00 | 2017 | |
| 46 | Tunisia | 37.00 | 2017 | |
| 47 | Togo | 35.00 | 2017 | |
| 48 | Myanmar | 35.00 | 2017 | |
| 49 | Cape Verde | 34.00 | 2017 | |
| 50 | Ghana | 34.00 | 2017 | |
| 51 | Jordan | 33.00 | 2017 | |
| 52 | Gambia | 33.00 | 2017 | |
| 53 | North Korea | 32.00 | 2017 | |
| 54 | Armenia | 32.00 | 2017 | |
| 55 | Angola | 32.00 | 2017 | |
| 56 | Somalia | 32.00 | 2017 | |
| 57 | Morocco | 32.00 | 2017 | |
| 58 | Lebanon | 30.00 | 2017 | |
| 59 | Tanzania | 29.00 | 2017 | |
| 60 | Republic of Macedonia | 29.00 | 2017 | |
| 61 | Vietnam | 29.00 | 2017 | |
| 62 | Guinea-Bissau | 29.00 | 2017 | |
| 63 | São Tomé and Príncipe | 28.00 | 2017 | |
| 64 | Uzbekistan | 28.00 | 2017 | |
| 65 | Kenya | 28.00 | 2017 | |
| 66 | Lesotho | 28.00 | 2017 | |
| 67 | Zambia | 27.00 | 2017 | |
| 68 | Bosnia and Herzegovina | 27.00 | 2017 | |
| 69 | Guinea | 26.00 | 2017 | |
| 70 | Thailand | 26.00 | 2017 | |
| 71 | Ivory Coast | 25.00 | 2017 | |
| 72 | Namibia | 25.00 | 2017 | |
| 73 | South Africa | 25.00 | 2017 | |
| 74 | Laos | 25.00 | 2017 | |
| 75 | Cambodia | 25.00 | 2017 | |
| 76 | South Korea | 25.00 | 2017 | |
| 77 | Serbia | 24.00 | 2017 | |
| 78 | Peru | 24.00 | 2017 | |
| 79 | El Salvador | 24.00 | 2017 | |
| 80 | Trinidad and Tobago | 24.00 | 2017 | |
| 81 | Guatemala | 24.00 | 2017 | |
| 82 | Suriname | 24.00 | 2017 | |
| 83 | Barbados | 23.00 | 2017 | |
| 84 | Malawi | 23.00 | 2017 | |
| 85 | Botswana | 23.00 | 2017 | |
| 86 | Belize | 23.00 | 2017 | |
| 87 | Guyana | 22.00 | 2017 | |
| 88 | Saint Lucia | 22.00 | 2017 | |
| 89 | Saint Vincent and the Grenadines | 22.00 | 2017 | |
| 90 | Georgia | 22.00 | 2017 | |
| 91 | Kyrgyzstan | 22.00 | 2017 | |
| 92 | Zimbabwe | 22.00 | 2017 | |
| 93 | Madagascar | 22.00 | 2017 | |
| 94 | Grenada | 22.00 | 2017 | |
| 95 | Turkmenistan | 21.00 | 2017 | |
| 96 | Bolivia | 21.00 | 2017 | |
| 97 | Chile | 21.00 | 2017 | |
| 98 | Israel | 21.00 | 2017 | |
| 99 | Mozambique | 21.00 | 2017 | |
| 100 | Sierra Leone | 21.00 | 2017 | |
| 101 | Mexico | 20.00 | 2017 | |
| 102 | Comoros | 20.00 | 2017 | |
| 103 | Seychelles | 20.00 | 2017 | |
| 104 | Montenegro | 20.00 | 2017 | |
| 105 | Ukraine | 20.00 | 2017 | |
| 106 | Poland | 20.00 | 2017 | |
| 107 | Honduras | 20.00 | 2017 | |
| 108 | Singapore | 19.00 | 2017 | |
| 109 | Bulgaria | 19.00 | 2017 | |
| 110 | Dominica | 19.00 | 2017 | |
| 111 | Azerbaijan | 19.00 | 2017 | |
| 112 | Cuba | 19.00 | 2017 | |
| 113 | East Timor | 19.00 | 2017 | |
| 114 | Belarus | 18.00 | 2017 | |
| 115 | Antigua and Barbuda | 18.00 | 2017 | |
| 116 | Albania | 18.00 | 2017 | |
| 117 | Philippines | 18.00 | 2017 | |
| 118 | Swaziland | 17.00 | 2017 | |
| 119 | Cyprus | 17.00 | 2017 | |
| 120 | Croatia | 17.00 | 2017 | |
| 121 | Nicaragua | 17.00 | 2017 | |
| 122 | Liberia | 17.00 | 2017 | |
| 123 | The Bahamas | 17.00 | 2017 | |
| 124 | Slovakia | 17.00 | 2017 | |
| 125 | Venezuela | 17.00 | 2017 | |
| 126 | Colombia | 16.00 | 2017 | |
| 127 | Indonesia | 16.00 | 2017 | |
| 128 | Czech Republic | 16.00 | 2017 | |
| 129 | Slovenia | 16.00 | 2017 | |
| 130 | Italy | 16.00 | 2017 | |
| 131 | Moldova | 16.00 | 2017 | |
| 132 | Malaysia | 16.00 | 2017 | |
| 133 | Russia | 16.00 | 2017 | |
| 134 | Greece | 16.00 | 2017 | |
| 135 | Haiti | 15.00 | 2017 | |
| 136 | Hungary | 15.00 | 2017 | |
| 137 | Costa Rica | 15.00 | 2017 | |
| 138 | Mauritius | 14.00 | 2017 | |
| 139 | Ecuador | 14.00 | 2017 | |
| 140 | Romania | 14.00 | 2017 | |
| 141 | Malta | 13.00 | 2017 | |
| 142 | Dominican Republic | 13.00 | 2017 | |
| 143 | Kazakhstan | 13.00 | 2017 | |
| 144 | Latvia | 13.00 | 2017 | |
| 145 | Argentina | 13.00 | 2017 | |
| 146 | Jamaica | 13.00 | 2017 | |
| 147 | Austria | 12.00 | 2017 | |
| 148 | Brazil | 12.00 | 2017 | |
| 149 | Papua New Guinea | 12.00 | 2017 | |
| 150 | Germany | 12.00 | 2017 | |
| 151 | Belgium | 12.00 | 2017 | |
| 152 | Netherlands | 12.00 | 2017 | |
| 153 | American Samoa | 12.00 | 2017 | |
| 154 | Sri Lanka | 11.00 | 2017 | |
| 155 | Guam | 11.00 | 2017 | |
| 156 | Greenland | 11.00 | 2017 | |
| 157 | France | 11.00 | 2017 | |
| 158 | Panama | 11.00 | 2017 | |
| 159 | Federated States of Micronesia | 11.00 | 2017 | |
| 160 | Japan | 11.00 | 2017 | |
| 161 | Samoa | 11.00 | 2017 | |
| 162 | Paraguay | 11.00 | 2017 | |
| 163 | Vanuatu | 11.00 | 2017 | |
| 164 | Solomon Islands | 11.00 | 2017 | |
| 165 | Lithuania | 11.00 | 2017 | |
| 166 | Bermuda | 11.00 | 2017 | |
| 167 | Denmark | 10.00 | 2017 | |
| 168 | Luxembourg | 10.00 | 2017 | |
| 169 | United Kingdom | 10.00 | 2017 | |
| 170 | Fiji | 10.00 | 2017 | |
| 171 | Kiribati | 10.00 | 2017 | |
| 172 | Switzerland | 10.00 | 2017 | |
| 173 | Andorra | 10.00 | 2017 | |
| 174 | Tonga | 10.00 | 2017 | |
| 175 | Marshall Islands | 10.00 | 2017 | |
| 176 | Virgin Islands (US) | 10.00 | 2017 | |
| 177 | Northern Mariana Islands | 9.00 | 2017 | |
| 178 | Spain | 9.00 | 2017 | |
| 179 | Uruguay | 9.00 | 2017 | |
| 180 | Australia | 8.00 | 2017 | |
| 181 | Republic of Ireland | 8.00 | 2017 | |
| 182 | Portugal | 8.00 | 2017 | |
| 183 | Puerto Rico | 8.00 | 2017 | |
| 184 | United States | 7.00 | 2017 | |
| 185 | Maldives | 7.00 | 2017 | |
| 186 | Estonia | 6.00 | 2017 | |
| 187 | Canada | 6.00 | 2017 | |
| 188 | Sweden | 6.00 | 2017 | |
| 189 | Iceland | 6.00 | 2017 | |
| 190 | Norway | 6.00 | 2017 | |
| 191 | New Zealand | 5.00 | 2017 | |
| 192 | Brunei | 5.00 | 2017 | |
| 193 | Finland | 5.00 | 2017 |