Riau Islands Most Polluted in Indonesia This Morning (24/11)

Air quality in Riau Islands this morning is the worst in Indonesia. Based on the Air Pollution Standard Index (ISPU) page of the Ministry of Environment and Forestry (KLHK) on Monday (24/11/2025) at 08:00 AM WIB, it was revealed that the air quality index in Riau Islands was 95.

According to the Directorate of Air Pollution Control KLHK, ISPU is a unitless number used to describe ambient air quality conditions at a specific location, based on its impact on human health, aesthetic value, and other living things.

ISPU calculation is based on measurements of seven air pollutant parameters: PM10, PM2.5, NO2, SO2, CO, O3, and HC. Air pollutant parameter measurements are distributed across 72 stations in various regions.

Based on Ministry of Environment and Forestry Regulation No. 14 of 2020 concerning the Air Pollution Standard Index, ISPU in the range of 0-50 indicates good air quality, 51-100 means moderate air quality, and 101-200 indicates unhealthy air quality that is harmful to humans, animals, and plants.

Furthermore, very unhealthy air quality in the range of 201-300 can increase health risks for sensitive groups. Meanwhile, hazardous air quality in the range of over 300 can seriously harm health and requires prompt action.

Below Riau Islands, Central Kalimantan ranks second worst in Indonesia with an air quality index of 90. Then, in third place is Aceh with an air quality index of 87.

This means no region has hazardous air quality.

Here is a list of the 10 provinces with the worst air quality index in Indonesia on Monday, November 24, 2025, at 08:00 AM WIB.

1. Riau Islands: 95

2. Central Kalimantan: 90

3. Aceh: 87

4. West Sumatra: 86

5. North Sumatra: 85

6. East Java: 80

7. West Java: 79

8. South Sulawesi: 74

9. North Sulawesi: 68

10. South Kalimantan: 66