South Sumatra's Air Quality Tonight (25/12) Worst in Indonesia

Air quality in South Sumatra tonight is the worst in Indonesia. Based on the Pollutant Standard Index (ISPU) page of the Ministry of Environment and Forestry (KLHK) on Thursday (25/12/2025) at 18:00 WIB, it was revealed that the air quality index in South Sumatra was 99.

According to the KLHK Directorate of Air Pollution Control, ISPU is a unitless number used to describe the ambient air quality conditions at a specific location and is 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 spread across 72 stations in various regions.

(Read: Number of Houses Damaged by Floods and Landslides in Sumatra (December 17, 2025))

Based on KLHK Regulation No. 14 of 2020 concerning the Pollutant Standard Index, an ISPU in the range of 0-50 indicates good air quality, a range of 51-100 means moderate air quality, and a range of 101-200 indicates unhealthy air quality that is harmful 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 in the range of more than 300 can seriously harm health and requires quick handling.

Below South Sumatra, West Java occupies the second worst position in Indonesia with an air quality index of 97. Then, in the third position is Riau with an air quality index of 96.

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, December 25, 2025, at 18:00 WIB.

1. South Sumatra: 99

2. West Java: 97

3. Riau: 96

4. Banten: 95

5. Jambi: 92

6. Aceh: 91

7. West Sumatra: 87

8. North Sumatra: 84

9. North Sumatra: 79

10. Lampung: 74

(Read: Number of Houses Damaged by Floods and Landslides in Sumatra (December 17, 2025))