Air Pollution Tuesday Night (25/11): Riau Islands Worst, How About Other Regions?

Air quality in Riau Islands tonight is the worst in Indonesia. Based on the Air Pollution Standard Index (ISPU) page of the Ministry of Environment and Forestry (KLHK) on Tuesday (25/11/2025) at 6:00 PM WIB, it was revealed that the air quality index in Riau Islands was 95.

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

ISPU calculation is 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.

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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.

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

Below Riau Islands, Riau ranks second worst in Indonesia with an air quality index of 92. Then, in third place is West Sumatra with an air quality index of 87.

This means that no region has hazardous air quality.

Here is a list of the 10 provinces with the worst air quality index in Indonesia on Tuesday, November 25, 2025 at 6:00 PM WIB.

1. Riau Islands: 95

2. Riau: 92

3. West Sumatra: 87

4. Aceh: 86

5. South Sumatra: 84

6. West Java: 81

7. South Sulawesi: 74

8. Central Java: 73

9. North Sulawesi: 68

10. South Kalimantan: 67

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