Sunday Morning Air Pollution (1/2): West Kalimantan is the Worst, How About Other Regions?

Air quality in West Kalimantan this morning is the worst in Indonesia. Based on the Air Pollutant Standard Index (ISPU) page of the Ministry of Environment and Forestry (KLHK) on Sunday (1/2/2026) at 08.00 AM WIB, the air quality index in West Kalimantan was 110.

According to the KLHK Directorate of Air Pollution Control, ISPU is a unitless number used to describe ambient air quality conditions at a specific location and is based on impacts on human health, aesthetic value, and other living things.

ISPU calculations are 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: Due to Forest Fires, South Kalimantan's ARI Cases Reached 189 Thousand as of September 2023)

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

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

Below West Kalimantan, South Sumatra ranks second worst in Indonesia with an air quality index of 100. Then, in third place is Riau with an air quality index of 96.

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 Sunday, February 1, 2026, at 08.00 AM WIB.

1. West Kalimantan: 110

2. South Sumatra: 100

3. Riau: 96

4. North Sumatra: 93

5. Jambi: 89

6. South Kalimantan: 86

7. West Java: 83

8. Aceh: 82

9. Suamtera Utara: 78

10. Central Kalimantan: 74

(Read: Due to Forest Fires, South Kalimantan's ARI Cases Reached 189 Thousand as of September 2023)