Riau Most Polluted in Indonesia Tonight (8/1)

Air quality in Riau tonight is the worst in Indonesia. Based on the Air Pollution Standard Index (ISPU) page of the Ministry of Environment and Forestry (KLHK) on Thursday (8/1/2026) at 6:00 PM WIB, it was revealed that the air quality index in Riau was 100.

According to the Directorate of Air Pollution Control KLHK, ISPU is a dimensionless number used to describe ambient air quality conditions in a specific location and is based on the 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: Trend of Volcanic Eruptions in Recent Years)

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 immediate attention.

Below Riau, Jambi occupies the second worst position in Indonesia with an air quality index of 99. Then, in third place is Aceh with an air quality index of 98.

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 Thursday, January 8, 2026 at 6:00 PM WIB.

1. Riau: 100

2. Jambi: 99

3. Aceh: 98

4. Banten: 95

5. South Sumatra: 92

6. West Java: 89

7. West Sumatra: 87

8. North Sumatra: 81

9. Lampung: 74

10. East Kalimantan: 72

(Read: Trend of Volcanic Eruptions in Recent Years)