South Sumatra Most Polluted in Indonesia Tonight (6/1)

Air quality in South Sumatra is the worst in Indonesia tonight. Based on the Air Pollution Standard Index (ISPU) page of the Ministry of Environment and Forestry (KLHK) on Tuesday (6/1/2026) at 6:00 PM WIB, it was revealed that the air quality index in South Sumatra was 100.

According to the KLHK Directorate of Air Pollution Control, ISPU is a unitless number used to describe ambient air quality conditions in a specific location, based on its impact on human health, aesthetic value, and other living things.

ISPU calculation is based on the measurement results 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: Indications of Forest and Land Fire Area in Central Kalimantan Province in the Last Decade)

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

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

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

This means no region has hazardous air quality.

Here is a list of the 10 provinces with the worst air quality index in Indonesia on Tuesday, January 6, 2026, at 6:00 PM WIB.

1. South Sumatra: 100

2. Aceh: 99

3. Banten: 95

4. Riau: 92

5. Jambi: 91

6. West Java: 89

7. West Sumatra: 86

8. North Sumatra: 82

9. North Sumatra: 75

10. Lampung: 74

(Read: Indications of Forest and Land Fire Area in Central Kalimantan Province in the Last Decade)