10 Most Polluted Areas in Indonesia Tonight (March 19)

South Sumatra 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 Thursday (March 19, 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: Kurious Survey: Many People Feel Indonesia's Air Quality is Poor)

Based on KLHK Regulation No. 14 of 2020 concerning the Air Pollution Standard Index, ISPU in the 0-50 range means 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, West Java ranks second worst in Indonesia with an air quality index of 95. Then, East Kalimantan ranks third with an air quality index of 89.

This means that no region has hazardous air quality.

Here is the list of 10 provinces with the worst air quality index in Indonesia on Thursday, March 19, 2026 at 18:00 WIB.

1. South Sumatra: 97

2. West Java: 95

3. East Kalimantan: 89

4. South Kalimantan: 83

5. South Sulawesi: 81

6. Banten: 79

7. North Sumatra: 75

8. East Java: 71

9. Central Java: 68

10. Riau: 67

(Read: Kurious Survey: Many People Feel Indonesia's Air Quality is Poor)