South Sumatra's Nighttime Air Quality (26/2) is the Worst in Indonesia

South Sumatra's air quality tonight is the worst in Indonesia. Based on the Air Pollution Standard Index (ISPU) page of the Ministry of Environment and Forestry (KLHK) on Thursday (2/26/2026) at 18.00 WIB, it was revealed that the air quality index in South Sumatra is 97.

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: 207 Thousand Houses Submerged in Early 2026 Floods, Most in Central Java)

Based on KLHK 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 Sumatra, there is Banten which ranks second worst in Indonesia with an air quality index of 95. Then, in third place is Riau with an air quality index of 94.

This means that no region has hazardous air quality.

Below is the list of 10 provinces with the worst air quality index in Indonesia on Thursday, February 26, 2026 at 18.00 WIB.

1. South Sumatra: 97

2. Banten: 95

3. Riau: 94

4. Aceh: 90

5. North Sumatra: 89

6. West Java: 88

7. West Sumatra: 87

8. Central Java: 79

9. North Sumatra: 77

10. South Kalimantan: 76

(Read: 207 Thousand Houses Submerged in Early 2026 Floods, Most in Central Java)