North Sumatra Air Pollution on Night of March 13 is the Worst in Indonesia

North Sumatra's air quality tonight is the worst in Indonesia. Based on the Air Pollution Standard Index (ISPU) page of the Ministry of Environment and Forestry (KLHK) on Friday (March 13, 2026) at 6:00 PM WIB, it was revealed that the air quality index in North Sumatra is 94.

According to KLHK's 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.

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Based on KLHK 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 indicates unhealthy air that is harmful to humans, animals, and plants.

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

Below North Sumatra, South Sumatra ranks second worst in Indonesia with an air quality index of 91. Then, West Java ranks third with an air quality index of 90.

This means that no region has hazardous air quality.

Below is the list of the 10 provinces with the worst air quality index in Indonesia on Friday, March 13, 2026 at 6:00 PM WIB.

1. North Sumatra: 94

2. South Sumatra: 91

3. West Java: 90

4. Jambi: 88

5. West Sumatra: 87

6. Riau: 86

7. North Sumatra: 85

8. Central Kalimantan: 84

9. South Sulawesi: 75

10. Central Java: 73

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