10 Most Polluted Regions in Indonesia This Morning (9/9)

Air quality in Banten 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 Tuesday (9/9/2025) at 08:00 AM WIB, Banten''s air quality index was 108.

According to the KLHK Directorate of Air Pollution Control, ISPU is a dimensionless 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 spread across 72 stations in various regions.

(Read: Flood Disaster Events in Indonesia Increased Period 2008-2025)

Based on KLHK Regulation No. 14 Year 2020 concerning the Air Pollution Standard Index, ISPU in the range 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 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 prompt action.

Below Banten, Riau Islands ranks second worst in Indonesia with an air quality index of 92. Then, in third place is DKI Jakarta with an air quality index of 91.

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 Tuesday, September 9, 2025, at 08:00 AM WIB.

1. Banten: 108

2. Riau Islands: 92

3. DKI Jakarta: 91

4. South Sumatra: 90

5. Riau: 89

6. Central Kalimantan: 88

7. Aceh: 87

8. Lampung: 84

9. North Sumatra: 82

10. East Java: 78

(Read: Flood Disaster Events in Indonesia Increased Period 2008-2025)