10 Most Polluted Regions in Indonesia This Morning (29/12)

Air quality in North Sumatra this morning is the worst in Indonesia. Based on the Air Pollution Standard Index (ISPU) page of the Ministry of Environment and Forestry (KLHK) on Monday (29/12/2025) at 08:00 AM WIB, it was revealed that the air quality index in North Sumatra was 698.

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

(Baca: Hampir 5 Ribu Kejadian Bencana Alam di Indonesia Sepanjang 2023, Karhutla Mendominasi)

Based on Ministry of Environment and Forestry Regulation No. 14 of 2020 concerning the Air Pollution Standard Index, ISPU in the range of 0-50 indicates good air quality, 51-100 means moderate air quality, and 101-200 means 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 of over 300 can seriously harm health and requires prompt action.

Below North Sumatra, Riau occupies the second worst position in Indonesia with an air quality index of 128. Then, in third place is South Sumatra with an air quality index of 102.

This means North Sumatra has hazardous air quality.

Here is a list of the 10 provinces with the worst air quality index in Indonesia on Monday, December 29, 2025, at 08:00 AM WIB.

1. North Sumatra: 698

2. Riau: 128

3. South Sumatra: 102

4. Jambi: 98

5. Banten: 95

6. Aceh: 94

7. West Sumatra: 87

8. North Sumatra: 84

9. Lampung: 74

10. East Kalimantan: 72

(Baca: Hampir 5 Ribu Kejadian Bencana Alam di Indonesia Sepanjang 2023, Karhutla Mendominasi)