Most polluted cities in Hong Kong, June 2023

No city in Hong Kong had measurements on 70% of the days, so June 2023 has no board for Hong Kong.

Good0–5

Fair6–15

Moderate16–50

Poor51–90

Very poor91–140

Extremely poor141+

The European Environment Agency's air quality index bands for PM2.5 (2024 revision); it has bands, not numbers, so values stay in µg/m³. Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales