Riau's Morning Air Pollution (11/12) Worst in Indonesia

Riau's air quality this morning is the worst in Indonesia. Based on the Air Pollutant Standard Index (ISPU) page of the Ministry of Environment and Forestry (KLHK) on Thursday (11/12/2025) at 08.00 AM WIB, it was revealed that Riau's air quality index was 99.

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 calculation is based on the measurement results of seven air pollutant parameters, namely PM10, PM2.5, NO2, SO2, CO, O3, and HC. Air pollutant parameter measurements are spread across 72 stations in various regions.

(Read: 4.8 M Earthquake Shakes 219 Km East of Levuka,)

Based on KLHK Regulation No. 14 of 2020 concerning the Air Pollutant Standard Index, an 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 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 above 300 can seriously harm health and requires prompt action.

Below Riau, South Sumatra ranks second worst in Indonesia with an air quality index of 98. Then, in third place is Banten with an air quality index of 95.

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, December 11, 2025, at 08.00 AM WIB.

1. Riau: 99

2. South Sumatra: 98

3. Banten: 95

4. Jambi: 93

5. Central Kalimantan: 88

6. West Sumatra: 87

7. West Papua: 84

8. West Java: 81

9. East Kalimantan: 76

10. Lampung: 74

(Read: 4.8 M Earthquake Shakes 219 Km East of Levuka,)