Most polluted cities in Hong Kong, July 2026

No city in Hong Kong had measurements on 70% of the days, so July 2026 has no board for Hong Kong.

Low risk1–3

Moderate risk4–6

High risk7–10

Very high risk10+

Canada's AQHI+ for PM2.5 (1 point per 10 µg/m³), which is defined on hourly values. Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales