Riau''s Air Quality Tonight (30/8) is the Worst in Indonesia

Air quality in Riau tonight is the worst in Indonesia. Based on the Air Pollution Standard Index (APSI) page of the Ministry of Environment and Forestry (KLHK) on Saturday (30/8/2025) at 18.00 WIB, it was revealed that Riau''s air quality index was 92.

According to the KLHK Directorate of Air Pollution Control, APSI is a dimensionless number used to describe ambient air quality conditions at a specific location and is based on its impact on human health, aesthetic value, and other living things.

APSI calculations are 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: West Kalimantan Produced the Most CO2 Emissions from Forest Fires Until July 2023)

Based on KLHK Regulation No. 14 of 2020 concerning the Air Pollution Standard Index, APSI in the range of 0-50 indicates good air quality, 51-100 means moderate air quality, and 101-200 means 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 over 300 can seriously harm health and requires quick action.

Below Riau, Kep. Riau occupies the second-worst position in Indonesia with an air quality index of 91. Then, in third place is Central Kalimantan with an air quality index of 88.

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 Saturday, August 30, 2025 at 18.00 WIB.

1. Riau: 92

2. Kep. Riau: 91

3. Central Kalimantan: 88

4. South Sumatra: 87

5. Banten: 82

6. West Java: 79

7. North Sumatra: 78

8. Central Java: 76

9. DKI Jakarta: 74

10. South Kalimantan: 68

(Read: West Kalimantan Produced the Most CO2 Emissions from Forest Fires Until July 2023)