Riau Air Pollution on the Morning of April 12 is the Worst in Indonesia

Riau's air quality this morning is the worst in Indonesia. Based on the Air Pollution Standard Index (ISPU) page of the Ministry of Environment and Forestry (KLHK) on Sunday (April 12, 2026) at 08:00 WIB, it was revealed that Riau's air quality index is 104.

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. Air pollutant parameter measurements are spread across 72 stations in various regions.

(Read: 12 Million Indonesian People Affected by Natural Disasters in 2025)

Based on Minister of Environment and Forestry 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 Riau, South Sumatra ranks second worst in Indonesia with an air quality index of 94. Then, Aceh ranks third with an air quality index of 90.

This means no region has hazardous air quality.

Below is the list of 10 provinces with the worst air quality index in Indonesia on Sunday, April 12, 2026 at 08:00 WIB.

1. Riau: 104

2. South Sumatra: 94

3. Aceh: 90

4. West Sumatra: 86

5. DKI Jakarta: 85

6. East Java: 84

7. Jambi: 83

8. South Sulawesi: 79

9. Banten: 74

10. North Sumatra: 62

(Read: 12 Million Indonesian People Affected by Natural Disasters in 2025)