10 Most Polluted Regions in Indonesia Tonight (9/11)

Air quality in Banten tonight is the worst in Indonesia. Based on the Air Pollution Standard Index (ISPU) page of the Ministry of Environment and Forestry (KLHK) on Thursday (9/11/2025) at 6:00 PM WIB, it was revealed that the air quality index in Banten was 94.

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 and is based on its impact on human health, aesthetic value, and other living things.

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

(Read: Jakarta''s Air Quality This Morning is the Second Worst in the World (Friday, June 17, 2022))

Based on KLHK 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 signifies 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 Banten, Lampung ranks second worst in Indonesia with an air quality index of 92. Then, in third place is Riau with an air quality index of 89.

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 Thursday, September 11, 2025 at 6:00 PM WIB.

1. Banten: 94

2. Lampung: 92

3. Riau: 89

4. Central Kalimantan: 88

5. Aceh: 87

6. North Sumatra: 85

7. North Sumatra: 81

8. DKI Jakarta: 78

9. Jambi: 71

10. South Kalimantan: 68

(Read: Jakarta''s Air Quality This Morning is the Second Worst in the World (Friday, June 17, 2022))