10 Most Polluted Regions in Indonesia Tonight (14/12)

Air quality in South Sumatra is the worst in Indonesia tonight. Based on the Air Pollutant Standard Index (ISPU) page of the Ministry of Environment and Forestry (KLHK) on Sunday (14/12/2025) at 18:00 WIB, it was revealed that the air quality index in South Sumatra was 100.

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

(Read: Last Five Earthquakes Recorded by BMKG (Saturday, July 19, 2025 18:25:55 WIB))

Based on KLHK Regulation No. 14 of 2020 concerning the Air Pollutant 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.

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 above 300 can seriously harm health and requires quick handling.

Below South Sumatra, Riau ranks second worst in Indonesia with an air quality index of 98. Then, in third place is Banten with an air quality index of 95.

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 Sunday, December 14, 2025 at 18:00 WIB.

1. South Sumatra: 100

2. Riau: 98

3. Banten: 95

4. Jambi: 93

5. East Kalimantan: 89

6. Central Kalimantan: 88

7. West Sumatra: 87

8. North Sumatra: 83

9. West Java: 78

10. Lampung: 74

(Read: Last Five Earthquakes Recorded by BMKG (Saturday, July 19, 2025 18:25:55 WIB))