Air Pollution Sunday Night (April 12): Riau is the Worst, How About Other Regions?

Riau 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 Sunday (April 12, 2026) at 18:00 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. Pollutant parameter measurements are spread across 72 stations in various regions.

(Read: Jakarta Flood Point Distribution (January 13, 2026 at 08:00 WIB))

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, the 51-100 range means moderate air quality, and the 101-200 range indicates 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, Aceh ranks third with an air quality index of 89.

This means that no region has hazardous air quality.

Below is the list of the 10 provinces with the worst air quality index in Indonesia on Sunday, April 12, 2026 at 18:00 WIB.

1. Riau: 95

2. South Sumatra: 90

3. Aceh: 89

4. West Sumatra: 87

5. DKI Jakarta: 85

6. West Java: 84

7. East Java: 82

8. Jambi: 80

9. South Sulawesi: 79

10. Banten: 71

(Read: Jakarta Flood Point Distribution (January 13, 2026 at 08:00 WIB))