SmogRank / World / Singapore / December 2025
Most polluted cities in Singapore, December 2025
No city in Singapore had measurements on 70% of the days, so December 2025 has no board for Singapore.
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+
The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales