Air Pollution on Thursday Morning (23/4): West Java is the Worst, How About Other Regions?

West Java 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 Thursday (23/4/2026) at 08:00 WIB, it was revealed that West Java's air quality index is 113.

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. Pollutant parameter measurements are spread across 72 stations in various regions.

(Read: After Spiking, the Number of Natural Disasters in Indonesia Decreased in 2024)

Based on KLHK Regulation No. 14 of 2020 concerning the Air Pollution Standard Index, an ISPU in the 0-50 range indicates good air quality, 51-100 means moderate air quality, and 101-200 means unhealthy air that is harmful to humans, animals, and plants.

Next, an ISPU in the 201-300 range indicates very unhealthy air, which can increase health risks for sensitive groups. Meanwhile, an ISPU above 300 indicates hazardous air quality, which can seriously harm health and requires immediate handling.

After West Java, DKI Jakarta ranks second worst in Indonesia with an air quality index of 107. Then, Riau ranks third with an air quality index of 96.

This means no region has hazardous air quality.

Below is the list of 10 provinces with the worst air quality index in Indonesia on Thursday, April 23, 2026 at 08:00 WIB.

1. West Java: 113

2. DKI Jakarta: 107

3. Riau: 96

4. North Sumatra: 91

5. South Sumatra: 89

6. West Sumatra: 86

7. Aceh: 82

8. Banten: 81

9. South Sulawesi: 79

10. East Java: 76

(Read: After Spiking, the Number of Natural Disasters in Indonesia Decreased in 2024)