Most polluted cities in Singapore, April 2023

No city in Singapore had measurements on 70% of the days, so April 2023 has no board for Singapore.

Good0–9.0

Moderate9.1–35.4

Sensitive groups35.5–55.4

Unhealthy55.5–125.4

Very unhealthy125.5–225.4

Hazardous225.5+