Riau's Air Quality on Friday Morning (April 17) 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 Friday (April 17, 2026) at 08.00 WIB, it was revealed that the air quality index in Riau is 100.

According to the KLHK Air Pollution Control Directorate, ISPU is a unitless number used to describe the 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: 4.8 M Earthquake Shakes 219 Km East of Levuka,)

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 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, West Java ranks second worst in Indonesia with an air quality index of 93. Then, South Sumatra ranks third with an air quality index of 91.

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 Friday, April 17, 2026 at 08.00 WIB.

1. Riau: 100

2. West Java: 93

3. South Sumatra: 91

4. DKI Jakarta: 88

5. West Sumatra: 87

6. Aceh: 86

7. Central Kalimantan: 82

8. Jambi: 81

9. South Sulawesi: 80

10. East Kalimantan: 76

(Read: 4.8 M Earthquake Shakes 219 Km East of Levuka,)