Air Pollution Wednesday Night (12/11): 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 Wednesday (12/11/2025) at 6:00 PM 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 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. Measurement of air pollutant parameters is spread across 72 stations in various regions.

(Read: East Nusa Tenggara Always Hit by Forest and Land Fires in the Last 10 Years, BMKG Urges Increased Preparedness)

Based on Minister 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 in sensitive groups. Meanwhile, hazardous air quality in the range above 300 can seriously harm health and requires prompt action.

Below Riau Islands, South Sumatra is in the second worst position in Indonesia with an air quality index of 94. 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 Wednesday, November 12, 2025, at 6:00 PM WIB.

1. Riau Islands: 95

2. South Sumatra: 94

3. Jambi: 93

4. Riau: 91

5. West Java: 88

6. West Sumatra: 87

7. Aceh: 84

8. North Sumatra: 83

9. Central Kalimantan: 82

10. Lampung: 79

(Read: East Nusa Tenggara Always Hit by Forest and Land Fires in the Last 10 Years, BMKG Urges Increased Preparedness)