10 Most Polluted Regions in Indonesia Tonight (Sept 16)

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 Tuesday (September 16, 2025) at 6:00 PM WIB, it was revealed that Banten''s air quality index was 111.

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 the measurement results of seven air pollutant parameters: PM10, PM2.5, NO2, SO2, CO, O3, and HC. Measurements of these air pollutant parameters are distributed across 72 stations in various regions.

(Read: 10 Provinces Most Affected by Floods in 2024)

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 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 rapid intervention.

Below Banten, DKI Jakarta ranks second worst in Indonesia with an air quality index of 105. Riau is in third place with an air quality index of 94.

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 Tuesday, September 16, 2025 at 6:00 PM WIB.

1. Banten: 111

2. DKI Jakarta: 105

3. Riau: 94

4. South Sumatra: 93

5. Riau Islands: 92

6. South Sumatra: 89

7. West Java: 87

8. Aceh: 86

9. Central Kalimantan: 82

10. North Sumatra: 81

(Read: 10 Provinces Most Affected by Floods in 2024)