South Sumatra Nighttime Air Pollution (March 14) 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) as of Saturday (March 14, 2026) at 6:00 PM WIB, it was revealed that South Sumatra's air quality index is 99.

According to KLHK's 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. Pollutant parameter measurements are spread across 72 stations in various regions.

(Read: Bangladesh Has the World's Worst Air Quality, How About Indonesia?)

Based on KLHK Regulation No. 14 of 2020 concerning the Air Pollution Standard Index, an ISPU in the 0-50 range indicates good air quality, 51-100 means moderate air quality, and 101-200 indicates unhealthy air 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, Riau ranks second worst in Indonesia with an air quality index of 96. Then, in third place is Jambi with an air quality index of 92.

This means no region has hazardous air quality.

Here is the list of the 10 provinces with the worst air quality index in Indonesia as of Saturday, March 14, 2026 at 6:00 PM WIB.

1. South Sumatra: 99

2. Riau: 96

3. Jambi: 92

4. South Kalimantan: 90

5. Aceh: 88

6. West Sumatra: 87

7. West Java: 83

8. South Sulawesi: 80

9. Central Kalimantan: 76

10. East Java: 71

(Read: Bangladesh Has the World's Worst Air Quality, How About Indonesia?)