10 Most Polluted Regions in Indonesia Tonight (7/9)

Air quality in Banten is the worst in Indonesia tonight. Based on the Air Pollution Standard Index (ISPU) page of the Ministry of Environment and Forestry (KLHK) on Sunday (7/9/2025) at 18:00 WIB, the air quality index in Banten was 140.

According to the Directorate of Air Pollution Control KLHK, ISPU is a unitless 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: East Nusa Tenggara Always Hit by Forest Fires in the Last 10 Years, BMKG Urges Increased Preparedness)

Based on Ministry 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 201-300 range can increase health risks in sensitive groups. Meanwhile, hazardous air quality in the range above 300 can seriously harm health and requires quick handling.

Below Banten, Central Kalimantan ranks second worst in Indonesia with an air quality index of 98. Then, in third place is Riau with an air quality index of 95.

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, September 7, 2025, at 18:00 WIB.

1. Banten: 140

2. Central Kalimantan: 98

3. Riau: 95

4. Riau Islands: 92

5. West Sumatra: 88

6. South Sumatra: 87

7. Aceh: 86

8. West Java: 85

9. East Java: 82

10. North Sumatra: 81

(Read: East Nusa Tenggara Always Hit by Forest Fires in the Last 10 Years, BMKG Urges Increased Preparedness)