Air Pollution Monday Night (10/11): 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 Monday (10/11/2025) at 18:00 WIB, it was revealed that the air quality index in Riau Islands was 95.

According to the Directorate of Air Pollution Control KLHK, ISPU is a dimensionless number used to describe the ambient air quality conditions in a certain location and is 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, namely PM10, PM2.5, NO2, SO2, CO, O3, and HC. Measurements of air pollutant parameters are spread across 72 stations in various regions.

(Read: How Do Residents Identify Clean Air Amid Poor Air Quality?)

Based on Ministry of Environment and Forestry 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 indicates 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 in the range of more than 300 can seriously harm health and requires quick action.

Below Riau Islands, South Sumatra is in the second worst position in Indonesia with an air quality index of 91. 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 Monday, November 10, 2025, at 18:00 WIB.

1. Riau Islands: 95

2. South Sumatra: 91

3. West Sumatra: 87

4. Riau: 86

5. Aceh: 85

6. North Sumatra: 82

7. Central Java: 79

8. South Sulawesi: 75

9. Lampung: 72

10. South Kalimantan: 70

(Read: How Do Residents Identify Clean Air Amid Poor Air Quality?)