10 Most Polluted Regions in Indonesia This Morning (19/1)

Air quality in West Java this morning is the worst in Indonesia. According to the Air Pollution Standard Index (ISPU) page of the Ministry of Environment and Forestry (KLHK) on Monday (19/1/2026) at 08:00 AM WIB, the air quality index in West Java was 109.

According to the KLHK Directorate of Air Pollution Control, ISPU is a dimensionless 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 things.

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

(Read: Floods, Natural Disasters That Often Hit Indonesia as of September 2025)

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 indicates unhealthy air quality that is detrimental to humans, animals, and plants.

Furthermore, 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 West Java, Banten ranks second worst in Indonesia with an air quality index of 95. Then, in third place is Jambi with an air quality index of 92.

This means no region has hazardous air quality.

Here is a list of the 10 provinces with the worst air quality index in Indonesia on Monday, January 19, 2026, at 08:00 AM WIB.

1. West Java: 109

2. Banten: 95

3. Jambi: 92

4. Aceh: 88

5. West Sumatra: 87

6. South Sumatra: 83

7. Central Kalimantan: 82

8. North Sumatra: 78

9. DKI Jakarta: 75

10. Lampung: 74

(Read: Floods, Natural Disasters That Often Hit Indonesia as of September 2025)