South Kalimantan is the Most Polluted in Indonesia Tonight (27/2)

South Kalimantan has the worst air quality in Indonesia tonight. Based on the Air Pollution Standard Index (ISPU) page of the Ministry of Environment and Forestry (KLHK) on Friday (February 27, 2026) at 18.00 WIB, it was revealed that the air quality index in South Kalimantan is 101.

According to the KLHK Air Pollution Control Directorate, 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 beings.

ISPU calculations are based on measurements 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: Indonesia Becomes the Most Earthquake-Prone Country as of 2025)

Based on Minister of Environment and Forestry Regulation No. 14 of 2020 concerning the Air Pollution Standard Index, ISPU in the 0-50 range indicates good air quality, 51-100 means moderate air quality, and 101-200 means unhealthy air quality that is harmful to humans, animals, and plants.

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

Below South Kalimantan, Banten ranks second worst in Indonesia with an air quality index of 95. Then, South Sumatra ranks third with an air quality index of 91.

This means that no region has hazardous air quality.

Here is the list of the 10 provinces with the worst air quality in Indonesia on Friday, February 27, 2026 at 18.00 WIB.

1. South Kalimantan: 101

2. Banten: 95

3. South Sumatra: 91

4. North Sumatra: 89

5. Riau: 88

6. Jambi: 87

7. West Sumatra: 86

8. Aceh: 84

9. West Java: 83

10. Lampung: 74

(Read: Indonesia Becomes the Most Earthquake-Prone Country as of 2025)