| 32 | Urban Honolulu HI, United States of America | North America | AQI 27 | PM2.5 4.3 µg/m³ |
| 41 | Murmansk, Russia | Europe | AQI 30 | PM2.5 3.9 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 |
| 63 | Geelong, Australia | Oceania | AQI 31 | PM2.5 5.6 µg/m³ |
| 81 | Saint-Denis, Réunion | Africa & Middle East | AQI 32 | PM2.5 5.7 µg/m³ |
| 108 | Anchorage AK, United States of America | North America | AQI 34 | PM2.5 5.6 µg/m³ |
| 112 | Halifax, Canada | North America | AQI 34 | PM2.5 5.7 µg/m³ |
| 115 | Vancouver, Canada | North America | AQI 34 | PM2.5 5.9 µg/m³ |
| 118 | Winnipeg, Canada | North America | AQI 34 | PM2.5 6 µg/m³ |
| 119 | Central Coast, Australia | Oceania | AQI 34 | PM2.5 6.1 µg/m³ |
| 126 | Wollongong, Australia | Oceania | AQI 34 | PM2.5 6.2 µg/m³ |
| 135 | Arkhangelsk, Russia | Europe | AQI 35 | PM2.5 5.8 µg/m³ |
| 147 | Canberra, Australia | Oceania | AQI 35 | PM2.5 6.7 µg/m³ |
| 155 | Tampere, Finland | Europe | AQI 36 | PM2.5 6 µg/m³ |
| 167 | Toamasina, Madagascar | Africa & Middle East | AQI 36 | PM2.5 6.6 µg/m³ |
| 176 | Bremerton WA, United States of America | North America | AQI 37 | PM2.5 6.2 µg/m³ |
| 189 | Surrey, Canada | North America | AQI 37 | PM2.5 6.7 µg/m³ |
| 192 | Kismayo, Somalia | Africa & Middle East | AQI 37 | PM2.5 6.8 µg/m³ |
| 193 | Newcastle, Australia | Oceania | AQI 37 | PM2.5 6.8 µg/m³ |
| 204 | Bergen, Norway | Europe | AQI 38 | PM2.5 6.5 µg/m³ |
| 205 | Stockholm, Sweden | Europe | AQI 38 | PM2.5 6.5 µg/m³ |
| 206 | Duluth MN WI, United States of America | North America | AQI 38 | PM2.5 6.6 µg/m³ |
| 208 | Olympia WA, United States of America | North America | AQI 38 | PM2.5 6.7 µg/m³ |
| 217 | Port Moresby, Papua New Guinea | Oceania | AQI 38 | PM2.5 7.1 µg/m³ |