South Sumatra's Air Quality Tonight (24/12) is the Worst in Indonesia

South Sumatra's air quality tonight is the worst in Indonesia. Based on the Air Pollutant Standard Index (ISPU) page of the Ministry of Environment and Forestry (KLHK) on Wednesday (December 24, 2025) at 18:00 WIB, it was revealed that the air quality index in South Sumatra was 100.

According to the Directorate of Air Pollution Control of KLHK, ISPU is a unitless number used to describe the ambient air quality conditions at a specific 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. Air pollutant parameter measurements are distributed across 72 stations in various regions.

(Read: Jakarta's Air Quality This Morning is the Third Worst in the World (Tuesday, June 6, 2023))

Based on Ministry of Environment and Forestry Regulation No. 14 of 2020 concerning the Air Pollutant Standard Index, 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.

Next, very unhealthy air quality in the range of 201-300 can increase health risks for sensitive groups. Meanwhile, hazardous air quality above 300 can seriously harm health and requires quick handling.

Below South Sumatra, North Sumatra ranks second worst in Indonesia with an air quality index of 99. Then, Banten is in third place with an air quality index of 95.

This means no region has hazardous air quality.

Here is the list of the 10 provinces with the worst air quality index in Indonesia on Wednesday, December 24, 2025, at 18:00 WIB.

1. South Sumatra: 100

2. North Sumatra: 99

3. Banten: 95

4. Riau: 94

5. Jambi: 90

6. Aceh: 89

7. West Sumatra: 87

8. North Sumatra: 81

9. East Kalimantan: 74

10. Central Java: 69

(Read: Jakarta's Air Quality This Morning is the Third Worst in the World (Tuesday, June 6, 2023))