10 Most Polluted Regions in Indonesia This Morning (24/8)

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 Sunday (24/8/2025) at 08:00 AM WIB, it was revealed that the air quality index in Riau Islands was 119.

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

ISPU calculation is based on the measurement results of seven air pollutant parameters, namely PM10, PM2.5, NO2, SO2, CO, O3, and HC. Measurements of air pollutant parameters are spread across 72 stations in various regions.

(Read: There Were 31 Disasters in Indonesia at the End of May 2024, Floods Dominated)

Based on the Minister of Environment and Forestry Regulation No. 14 of 2020 concerning the Air Pollution Standard Index, an 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 detrimental 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 more than 300 can seriously harm health and requires quick handling.

Below Riau Islands, Bali ranks second worst in Indonesia with an air quality index of 110. Then, in third place is Banten with an air quality index of 97.

This means that no region has hazardous air quality.

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

1. Riau Islands: 119

2. Bali: 110

3. Banten: 97

4. South Sumatra: 92

5. East Java: 90

6. Riau: 87

7. Aceh: 86

8. DKI Jakarta: 81

9. West Java: 76

10. Central Java: 74

(Read: There Were 31 Disasters in Indonesia at the End of May 2024, Floods Dominated)