Riau's Air Quality Worst in Indonesia Wednesday Night (10/12)

Riau's air quality tonight is the worst in Indonesia. Based on the Air Pollutant Standard Index (ISPU) page of the Ministry of Environment and Forestry (KLHK) on Wednesday (10/12/2025) at 6:00 PM WIB, Riau's air quality index was 101.

According to the KLHK's Directorate of Air Pollution Control, ISPU is a unitless 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 calculations are based on the measurement results of seven air pollutant parameters: PM10, PM2.5, NO2, SO2, CO, O3, and HC. Measurements of these air pollutant parameters are spread across 72 stations in various regions.

(Read: Due to Forest Fires, Acute Respiratory Infections (ARI) in South Kalimantan Reached 189 Thousand Cases as of September 2023)

Based on KLHK Regulation No. 14 of 2020 concerning the Air Pollutant Standard Index, an ISPU 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.

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, Banten occupies the second worst position in Indonesia with an air quality index of 95. Then, in the third position is South Sumatra with an air quality index of 91.

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 Wednesday, December 10, 2025, at 6:00 PM WIB.

1. Riau: 101

2. Banten: 95

3. South Sumatra: 91

4. Central Kalimantan: 89

5. West Sumatra: 86

6. West Papua: 83

7. East Kalimantan: 75

8. Lampung: 74

9. South Kalimantan: 68

10. East Java: 64

(Read: Due to Forest Fires, Acute Respiratory Infections (ARI) in South Kalimantan Reached 189 Thousand Cases as of September 2023)