10 Most Polluted Regions in Indonesia This Morning (22/10)

Air quality in Banten this morning is the worst in Indonesia. Based on the Air Pollution Standard Index (ISPU) page of the Ministry of Environment and Forestry (KLHK) on Wednesday (22/10/2025) at 08.00 AM WIB, it was revealed that the air quality index in Banten was 95.

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

ISPU calculations are based on the measurement results of seven air pollutant parameters: PM10, PM2.5, NO2, SO2, CO, O3, and HC. Measurements of air pollutant parameters are spread across 72 stations in various regions.

(Read: 5 Provinces with the Most Forest and Land Fire Hotspots in Peat Ecosystems Until August 2025)

Based on KLHK 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 means 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 prompt attention.

Below Banten, Bali ranks second worst in Indonesia with an air quality index of 94. Then, in third place is South Sumatra with an air quality index of 93.

This means no region has hazardous air quality.

Here is a list of the 10 provinces with the worst air quality index in Indonesia on Wednesday, October 22, 2025 at 08.00 AM WIB.

1. Banten: 95

2. Bali: 94

3. South Sumatra: 93

4. Jambi: 90

5. Riau Islands: 89

6. Riau: 88

7. West Sumatra: 87

8. South Kalimantan: 85

9. East Java: 84

10. West Java: 83

(Read: 5 Provinces with the Most Forest and Land Fire Hotspots in Peat Ecosystems Until August 2025)