North Sumatra's Morning Air Pollution (Feb 9) is the Worst in Indonesia

North Sumatra's air quality 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 Monday (Feb 9, 2026) at 08.00 WIB, it was revealed that the air quality index in North Sumatra is 103.

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. Pollutant parameter measurements are spread across 72 stations in various regions.

(Read: Number of Houses Damaged by Floods and Landslides in Sumatra (December 17, 2025))

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 means unhealthy air quality 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 98. Then, Central Kalimantan is in third place with an air quality index of 96.

This means that no region has hazardous air quality.

Below is the list of 10 provinces with the worst air quality index in Indonesia on Monday, February 9, 2026 at 08.00 WIB.

1. North Sumatra: 103

2. South Sumatra: 98

3. Central Kalimantan: 96

4. Banten: 95

5. Jambi: 90

6. Aceh: 86

7. West Java: 85

8. North Sumatra: 81

9. Lampung: 74

10. South Sulawesi: 70

(Read: Number of Houses Damaged by Floods and Landslides in Sumatra (December 17, 2025))