Riau Islands Air Quality on Monday Night (3/11) is the Worst in Indonesia

Air quality in Riau Islands tonight is the worst in Indonesia. Based on the Air Pollutant Standard Index (ISPU) page of the Ministry of Environment and Forestry (KLHK) on Monday (3/11/2025) at 6:00 PM WIB, the air quality index in Riau Islands was 95.

According to the KLHK Directorate of Air Pollution Control, ISPU is a unitless 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: Forest and Land Fire Hotspots in South Sumatra Increased in Mid-October 2023)

Based on Permen LHK No. 14 of 2020 concerning the Air Pollutant Standard Index, an ISPU in the range of 0-50 indicates good air quality, a range of 51-100 means moderate air quality, and a range of 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 quick handling.

Below Riau Islands, Jambi ranks second worst in Indonesia with an air quality index of 87. Then, in third place is Riau with an air quality index of 86.

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, November 3, 2025, at 6:00 PM WIB.

1. Riau Islands: 95

2. Jambi: 87

3. Riau: 86

4. Central Kalimantan: 83

5. East Java: 81

6. North Sumatra: 80

7. DKI Jakarta: 77

8. South Sulawesi: 74

9. Banten: 67

10. North Sulawesi: 65

(Read: Forest and Land Fire Hotspots in South Sumatra Increased in Mid-October 2023)