| 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 |
| 38 | New Plymouth, New Zealand | Oceania | AQI 29 | PM2.5 5.2 µg/m³ |
| 44 | Adelaide, Australia | Oceania | AQI 30 | PM2.5 5.3 µg/m³ |
| 46 | Gold Coast, Australia | Oceania | AQI 30 | PM2.5 5.3 µg/m³ |
| 51 | Sunshine Coast, Australia | Oceania | AQI 30 | PM2.5 5.4 µg/m³ |
| 52 | Toowoomba, Australia | Oceania | AQI 30 | PM2.5 5.4 µg/m³ |
| 55 | Húsavík, Iceland | Europe | AQI 31 | PM2.5 3.4 µg/m³ |
| 60 | Thompson, Canada | North America | AQI 31 | PM2.5 5 µg/m³ |
| 61 | Coquitlam, Canada | North America | AQI 31 | PM2.5 5.2 µg/m³ |
| 63 | Geelong, Australia | Oceania | AQI 31 | PM2.5 5.6 µg/m³ |
| 74 | Corner Brook, Canada | North America | AQI 32 | PM2.5 4.9 µg/m³ |
| 75 | St. John's, Canada | North America | AQI 32 | PM2.5 4.9 µg/m³ |
| 77 | Burnaby, Canada | North America | AQI 32 | PM2.5 5.4 µg/m³ |
| 78 | Richmond, Canada | North America | AQI 32 | PM2.5 5.4 µg/m³ |
| 80 | Saint-Paul, Réunion | Africa & Middle East | AQI 32 | PM2.5 5.6 µg/m³ |
| 81 | Saint-Denis, Réunion | Africa & Middle East | AQI 32 | PM2.5 5.7 µg/m³ |
| 84 | Mackay, Australia | Oceania | AQI 32 | PM2.5 5.8 µg/m³ |
| 90 | Whitehorse, Canada | North America | AQI 33 | PM2.5 4.2 µg/m³ |
| 92 | Umeå, Sweden | Europe | AQI 33 | PM2.5 4.7 µg/m³ |
| 94 | Saanich, Canada | North America | AQI 33 | PM2.5 5.3 µg/m³ |
| 95 | Thunder Bay, Canada | North America | AQI 33 | PM2.5 5.3 µg/m³ |
| 96 | Oulu, Finland | Europe | AQI 33 | PM2.5 5.4 µg/m³ |
| 97 | Lower Hutt, New Zealand | Oceania | AQI 33 | PM2.5 5.9 µg/m³ |