Jakarta's Air Quality on Night of April 11 is the Worst in Indonesia

Jakarta'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 (April 11, 2026) at 18:00 WIB, it was revealed that Jakarta's air quality index is 101.

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 values, 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: Trends in Volcanic Eruptions in Recent Years)

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 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 Jakarta, West Java ranks second worst in Indonesia with an air quality index of 97. Then, in third place is Riau with an air quality index of 96.

This means no region has hazardous air quality.

Here is the list of 10 provinces with the worst air quality index in Indonesia on Saturday, April 11, 2026 at 18:00 WIB.

1. Jakarta: 101

2. West Java: 97

3. Riau: 96

4. South Sumatra: 93

5. East Java: 92

6. Aceh: 89

7. West Sumatra: 87

8. Jambi: 83

9. Banten: 79

10. East Kalimantan: 76

(Read: Trends in Volcanic Eruptions in Recent Years)