West Kalimantan is the Most Polluted in Indonesia This Morning (25/3)

Air quality in West Kalimantan is the worst in Indonesia this morning. Based on the Air Pollution Standard Index (ISPU) page of the Ministry of Environment and Forestry (KLHK) on Wednesday (March 25, 2026) at 08.00 WIB, it was revealed that the air quality index in West Kalimantan is 99.

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

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

(Read: Most Indonesians Access Air Quality Information from Social Media)

Based on Minister of Environment and Forestry Regulation No. 14 of 2020 concerning the Air Pollution Standard Index, ISPU in the 0-50 range indicates good air quality, 51-100 means moderate air quality, and 101-200 means unhealthy air quality that is harmful to humans, animals, and plants.

Next, air quality is very unhealthy in the 201-300 range, which can increase health risks for sensitive groups. Meanwhile, air quality is hazardous in the range above 300, which can seriously harm health and requires immediate handling.

Below West Kalimantan, Banten ranks second worst in Indonesia with an air quality index of 84. Then, East Java ranks third with an air quality index of 71.

This means that no region has hazardous air quality.

Here is the list of 10 provinces with the worst air quality index in Indonesia on Wednesday, March 25, 2026 at 08.00 WIB.

1. West Kalimantan: 99

2. Banten: 84

3. East Java: 71

4. Central Java: 68

5. Jambi: 67

6. Riau: 65

7. Yogyakarta: 64

8. West Java: 62

9. DKI Jakarta: 61

10. West Papua: 46

(Read: Most Indonesians Access Air Quality Information from Social Media)