West Java's Air Quality on Night of April 16 is the Worst in Indonesia

West Java's air quality tonight is the worst in Indonesia. Based on the Air Pollution Standard Index (ISPU) page of the Ministry of Environment and Forestry (KLHK) on Thursday (April 16, 2026) at 6:00 PM WIB, it was revealed that West Java's air quality index is 102.

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: Indonesia's Air Quality Improved Slightly in 2021)

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 indicates unhealthy air that is harmful to humans, animals, and plants.

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

After West Java, Riau ranks second with the worst air quality in Indonesia with an index of 100. Then, DKI Jakarta is in third place with an air quality index of 95.

This means that no region has hazardous air quality.

Below is the list of 10 provinces with the worst air quality index in Indonesia on Thursday, April 16, 2026 at 6:00 PM WIB.

1. West Java: 102

2. Riau: 100

3. DKI Jakarta: 95

4. South Sumatra: 91

5. West Sumatra: 87

6. Aceh: 86

7. Lampung: 82

8. Banten: 81

9. South Sulawesi: 80

10. North Sumatra: 79

(Read: Indonesia's Air Quality Improved Slightly in 2021)