10 Most Polluted Regions in Indonesia This Morning (26/12)

Air quality in Banten this morning is the worst in Indonesia. Based on the Air Pollution Standard Index (APSI) page of the Ministry of Environment and Forestry (KLHK) on Friday (26/12/2025) at 08.00 AM WIB, it was revealed that the air quality index in Banten was 95.

According to the Directorate of Air Pollution Control of KLHK, 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 beings.

APSI calculation is based on the measurement results of seven air pollutant parameters, namely PM10, PM2.5, NO2, SO2, CO, O3, and HC. The air pollutant parameter measurements are spread across 72 stations in various regions.

(Read: Many Forest Fires in Concession Areas, Especially Palm Oil Concessions)

Based on KLHK Regulation No. 14 of 2020 concerning the Air Pollution Standard Index, an APSI range of 0-50 indicates good air quality, 51-100 means moderate air quality, and 101-200 means unhealthy air quality, which is detrimental to humans, animals, and plants.

Furthermore, very unhealthy air quality in the 201-300 range can increase health risks for sensitive groups. Meanwhile, hazardous air quality in the range of over 300 can seriously harm health and requires prompt action.

Below Banten, Jambi ranks second worst in Indonesia with an air quality index of 94. Then, in third place is South Sumatra with an air quality index of 88.

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 Friday, December 26, 2025, at 08.00 AM WIB.

1. Banten: 95

2. Jambi: 94

3. South Sumatra: 88

4. Aceh: 87

5. West Sumatra: 86

6. North Sumatra: 85

7. North Sumatra: 78

8. East Kalimantan: 74

9. Central Kalimantan: 72

10. West Java: 66

(Read: Many Forest Fires in Concession Areas, Especially Palm Oil Concessions)