| 1 | Hanga Roa, Easter Island | South America | AQI 15 | PM2.5 1.9 µg/m³ |
| 2 | Papeete, French Polynesia | Oceania | AQI 15 | PM2.5 2.3 µg/m³ |
| 3 | Avarua, Cook Islands | Oceania | AQI 16 | PM2.5 2.2 µg/m³ |
| 4 | Pago Pago, American Samoa | Oceania | AQI 16 | PM2.5 2.8 µg/m³ |
| 5 | South Tarawa, Kiribati | Oceania | AQI 16 | PM2.5 2.8 µg/m³ |
| 6 | Majuro, Marshall Islands | Oceania | AQI 16 | PM2.5 2.9 µg/m³ |
| 7 | Palikir, Micronesia | Oceania | AQI 16 | PM2.5 2.9 µg/m³ |
| 8 | Alofi, Niue | Oceania | AQI 17 | PM2.5 2.6 µg/m³ |
| 9 | Yaren, Nauru | Oceania | AQI 17 | PM2.5 3 µg/m³ |
| 11 | Jamestown, Saint Helena | Africa & Middle East | AQI 18 | PM2.5 3 µg/m³ |
| 12 | Saipan, Northern Mariana Islands | Oceania | AQI 18 | PM2.5 3 µg/m³ |
| 13 | Apia, Samoa | Oceania | AQI 18 | PM2.5 3.1 µg/m³ |
| 14 | Funafuti, Tuvalu | Oceania | AQI 18 | PM2.5 3.3 µg/m³ |
| 15 | Hagåtña, Guam | Oceania | AQI 20 | PM2.5 3.4 µg/m³ |
| 16 | Mata-Utu, Wallis and Futuna | Oceania | AQI 20 | PM2.5 3.5 µg/m³ |
| 18 | West Island, Cocos (Keeling) Islands | Oceania | AQI 20 | PM2.5 3.5 µg/m³ |
| 20 | Georgetown, Ascension Island | Africa & Middle East | AQI 21 | PM2.5 3.7 µg/m³ |
| 21 | Nukuʻalofa, Tonga | Oceania | AQI 21 | PM2.5 3.7 µg/m³ |
| 22 | Nouméa, New Caledonia | Oceania | AQI 22 | PM2.5 3.7 µg/m³ |
| 25 | Port Vila, Vanuatu | Oceania | AQI 24 | PM2.5 4.2 µg/m³ |
| 26 | Victoria, Seychelles | Africa & Middle East | AQI 24 | PM2.5 4.4 µg/m³ |
| 27 | Porto Seguro, Brazil | South America | AQI 25 | PM2.5 4.4 µg/m³ |
| 30 | Lihue HI, United States of America | North America | AQI 27 | PM2.5 3.6 µg/m³ |
| 31 | Kahului HI, United States of America | North America | AQI 27 | PM2.5 4.2 µg/m³ |
| 32 | Urban Honolulu HI, United States of America | North America | AQI 27 | PM2.5 4.3 µg/m³ |