10 Most Polluted Areas in Indonesia This Morning (April 11)

Riau has the worst air quality in Indonesia this morning. Based on the Air Pollution Standard Index (ISPU) page of the Ministry of Environment and Forestry (KLHK) on Saturday (April 11, 2026) at 08.00 WIB, it was revealed that the air quality index in Riau is 95.

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: 4.5 M Earthquake Shakes 14 Km North of San Carlos,)

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 Riau, South Sumatra ranks second worst in Indonesia with an air quality index of 90. Then, East Java ranks third with an air quality index of 89.

This means that no region has hazardous air quality.

Here is the list of the 10 provinces with the worst air quality index in Indonesia on Saturday, April 11, 2026 at 08.00 WIB.

1. Riau: 95

2. South Sumatra: 90

3. East Java: 89

4. Aceh: 88

5. West Sumatra: 87

6. DKI Jakarta: 84

7. Jambi: 81

8. South Sulawesi: 79

9. Banten: 77

10. Lampung: 76

(Read: 4.5 M Earthquake Shakes 14 Km North of San Carlos,)