10 Most Polluted Regions in Indonesia Tonight (4/10)
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Air quality in Central Kalimantan is the worst in Indonesia tonight. According to the Ministry of Environment and Forestry (KLHK) Air Pollution Standard Index (ISPU) page on Sunday (04/10/2026) at 18:00 WIB, the air quality index in Central Kalimantan was recorded at 1162.
Per KLHK Air Pollution Control Directorate, ISPU is a unitless value describing ambient air quality at a location, assessed based on impacts on human health, aesthetics, and other living organisms.
ISPU calculation uses measurement data of seven air pollutant parameters: PM10, PM2.5, NO2, SO2, CO, O3, and HC. Pollutant monitoring is conducted across 72 stations nationwide.
(Read also: 137 Natural Disaster Events Recorded Before Late January 2024, Floods Most Frequent)
Under KLHK Ministerial Regulation No. 14/2020 on Air Pollution Standard Index: 0-50 = Good, 51-100 = Moderate, 101-200 = Unhealthy (adverse effects for humans, animals and vegetation).
Furthermore, 201-300 = Very Unhealthy (elevated health risks for sensitive groups), while values above 300 = Hazardous (severe health impacts requiring immediate response).
Following Central Kalimantan, South Kalimantan ranks second worst nationally with an index of 586, followed by South Sumatra at third place with 429.
This indicates the top three provinces all have Hazardous category air quality.
Below is the list of 10 provinces with the worst air quality in Indonesia on Sunday, 4 October 2026 at 18:00 WIB:
1. Central Kalimantan: 1162
2. South Kalimantan: 586
3. South Sumatra: 429
4. Jambi: 396
5. West Kalimantan: 241
6. Riau: 238
7. East Kalimantan: 200
8. Central Papua: 162
9. Central Sulawesi: 152
10. Banten: 142
(Read also: 137 Natural Disaster Events Recorded Before Late January 2024, Floods Most Frequent)
"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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