West Java Air Pollution at Night (21/2) 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 Saturday (21/2/2026) at 18.00 WIB, it was revealed that West Java's air quality index is 108.

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

(Read: Even After Being Rained On, Jakarta's Air Quality Remains Poor)

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 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 West Java, South Sumatra ranks second worst in Indonesia with an air quality index of 99. Then, in third place is Banten with an air quality index of 95.

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 Saturday, February 21, 2026 at 18.00 WIB.

1. West Java: 108

2. South Sumatra: 99

3. Banten: 95

4. Riau: 93

5. North Sumatra: 91

6. Jambi: 89

7. Aceh: 88

8. North Sumatra: 84

9. Lampung: 74

10. Central Java: 68

(Read: Even After Being Rained On, Jakarta's Air Quality Remains Poor)