South Sumatra Air Quality Thursday Night (Feb 19) is the Worst in Indonesia

South Sumatra's air quality is the worst in Indonesia tonight. Based on the Air Pollution Standard Index (ISPU) page of the Ministry of Environment and Forestry (KLHK) on Thursday (February 19, 2026) at 18.00 WIB, it was revealed that the air quality index in South Sumatra is 102.

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: West Kalimantan Produces the Most CO2 Emissions from Forest and Land Fires Until July 2023)

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, the 51-100 range means moderate air quality, and the 101-200 range indicates 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 South Sumatra, Riau ranks second worst in Indonesia with an air quality index of 97. Then, North Sumatra ranks third with an air quality index of 96.

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 Thursday, February 19, 2026 at 18.00 WIB.

1. South Sumatra: 102

2. Riau: 97

3. North Sumatra: 96

4. Banten: 95

5. Jambi: 94

6. Aceh: 92

7. West Java: 88

8. Lampung: 74

9. South Sulawesi: 72

10. South Kalimantan: 68

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