Air Pollution Saturday Night (Dec 20): South Sumatra Worst, How About Other Regions?

Air quality in South Sumatra tonight is the worst in Indonesia. According to the Air Pollutant Standard Index (APSI) page of the Ministry of Environment and Forestry (KLHK) on Saturday (December 20, 2025) at 6:00 PM WIB, the air quality index in South Sumatra was 96.

According to KLHK's Directorate of Air Pollution Control, APSI is a unitless number used to describe the ambient air quality conditions at a specific location, based on its impact on human health, aesthetic value, and other living things.

APSI calculations are 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: Diseases Suffered by Sumatra Flood Victims as of December 5, 2025)

Based on KLHK Regulation No. 14 Year 2020 concerning the Air Pollutant Standard Index, APSI in the range of 0-50 indicates good air quality, the range of 51-100 means moderate air quality, and the range of 101-200 indicates 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 more than 300 can seriously harm health and requires rapid intervention.

Below South Sumatra, Banten ranks as the second worst in Indonesia with an air quality index of 95. Then, Jambi is in third place with an air quality index of 90.

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 Saturday, December 20, 2025, at 6:00 PM WIB.

1. South Sumatra: 96

2. Banten: 95

3. Jambi: 90

4. Aceh: 87

5. North Sumatra: 85

6. North Sumatra: 84

7. Central Kalimantan: 82

8. Lampung: 74

9. East Kalimantan: 73

10. Central Java: 69

(Read: Diseases Suffered by Sumatra Flood Victims as of December 5, 2025)