Riau Most Polluted in Indonesia This Morning (1/12)

Air quality in Riau this morning is the worst in Indonesia. Based on the Air Pollution Standard Index (ISPU) page of the Ministry of Environment and Forestry (KLHK) on Monday (1/12/2025) at 08:00 AM WIB, it was revealed that the air quality index in Riau was 98.

According to the KLHK Directorate of Air Pollution Control, ISPU is a unitless number used to describe ambient air quality conditions at a certain location and is based on impacts 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: Jakarta's Air Quality is Third Worst in the World This Morning (Tuesday, June 6, 2023))

Based on Ministry of Environment and Forestry Regulation No. 14 of 2020 concerning the Air Pollution Standard Index, 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 harmful 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 action.

Below Riau, Banten ranks second worst in Indonesia with an air quality index of 95. Then, in third place is Jambi with an air quality index of 93.

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, December 1, 2025 at 08:00 AM WIB.

1. Riau: 98

2. Banten: 95

3. Jambi: 93

4. North Sumatra: 90

5. West Sumatra: 87

6. West Java: 86

7. East Java: 85

8. South Sumatra: 83

9. South Sulawesi: 74

10. DKI Jakarta: 73

(Read: Jakarta's Air Quality is Third Worst in the World This Morning (Tuesday, June 6, 2023))