Central Kalimantan Most Polluted in Indonesia Tonight (26/11)

Air quality in Central Kalimantan is the worst in Indonesia tonight. Based on the Air Pollution Standard Index (ISPU) page of the Ministry of Environment and Forestry (KLHK) on Wednesday (26/11/2025) at 18:00 WIB, it was revealed that the air quality index in Central Kalimantan was 98.

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 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 distributed across 72 stations in various regions.

(Read: Air Quality in Indonesia Slightly Improved in 2021)

Based on KLHK Regulation No. 14 of 2020 concerning the Air Pollution Standard Index, an ISPU in the range of 0-50 indicates good air quality, a range of 51-100 means moderate air quality, and a range of 101-200 means unhealthy air quality that is harmful 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 more than 300 can seriously harm health and requires prompt action.

Below Central Kalimantan, Riau Islands ranks second worst in Indonesia with an air quality index of 95. Then, in third place is North Sumatra with an air quality index of 93.

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 Wednesday, November 26, 2025 at 18:00 WIB.

1. Central Kalimantan: 98

2. Riau Islands: 95

3. North Sumatra: 93

4. Riau: 89

5. Jambi: 88

6. East Java: 86

7. West Java: 85

8. South Sumatra: 77

9. Central Java: 74

10. North Sulawesi: 67

(Read: Air Quality in Indonesia Slightly Improved in 2021)