10 Most Polluted Regions in Indonesia Tonight (25/10)
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Air quality in Central Kalimantan is the worst in Indonesia tonight. Based on the Ministry of Environment and Forestry (KLHK) Air Pollution Standard Index (ISPU) page on Sunday (25/10/2026) at 18:00 WIB, Central Kalimantan recorded an air quality index value of 1667.
According to KLHK Air Pollution Control Directorate, ISPU is a unitless index representing ambient air quality at a location, evaluated based on impacts on human health, aesthetics, and other living organisms.
ISPU is calculated from measurements of 7 air pollutant parameters: PM10, PM2.5, NO?, SO?, CO, O?, and HC, monitored across 72 stations nationwide.
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Per KLHK Ministerial Regulation No.14/2020 on Air Pollution Standard Index: 0-50 = Good, 51-100 = Moderate, 101-200 = Unhealthy (adverse effects on humans, animals, plants), 201-300 = Very Unhealthy (elevated risk for sensitive groups), >300 = Hazardous (severe health risks requiring immediate action).
Following Central Kalimantan, South Kalimantan ranks 2nd worst with index 1499, East Kalimantan 3rd with 587. All three top provinces fall into the Hazardous category.
Full ranking (25 Oct 2026 18:00 WIB):
1. Central Kalimantan: 1667
2. South Kalimantan: 1499
3. East Kalimantan: 587
4. South Sumatra: 367
5. Jambi: 286
6. West Kalimantan: 284
7. Riau: 233
8. Central Sulawesi: 163
9. North Sulawesi: 161
10. East Java: 94
"Disclosure: This is an AI-generated translation of the original article. We strive for accuracy, but please note that automated translations may contain errors or slight inconsistencies."
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