Riau Has the Worst Air Quality in Indonesia on Evening (5/5)
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Riau recorded the worst air quality in Indonesia this evening. As per Indonesia's Ministry of Environment and Forestry (KLHK) Air Pollution Standard Index (ISPU) data at 18:00 WIB on Tuesday (May 5, 2026), Riau obtained an air quality index value of 98.
According to KLHK Air Pollution Control Directorate, ISPU is a unitless index representing ambient air quality status at a location, measured based on impacts to human health, aesthetic values, and other living organisms.
ISPU is calculated from monitoring results of 7 air pollutant parameters: PM10, PM2.5, NO2, SO2, CO, O3, and HC. Pollutant measurement is conducted across 72 monitoring stations nationwide.
(Read also: M 4.8 Earthquake Strikes 219 km East of Levuka)
Based on Indonesian Environment Ministry Regulation No.14/2020 on ISPU: index 0-50 = Good air quality; 51-100 = Moderate quality; 101-200 = Unhealthy quality with adverse effects on humans, animals and plants; 201-300 = Very unhealthy (elevated health risk for sensitive groups); values over 300 = Hazardous, requiring immediate emergency response.
Following Riau, South Sumatra ranks 2nd worst at 92 index points, followed by West Sumatra at 91 points at 3rd place. No regions were measured in hazardous air quality category at this monitoring time.
Below is the full list of 10 Indonesian provinces with the poorest recorded air quality at 18:00 WIB May 5, 2026:
1. Riau: 98
2. South Sumatra: 92
3. West Sumatra: 91
4. West Java: 89
5. Aceh: 87
6. Jambi: 86
7. North Sumatra: 84
8. South Sulawesi: 79
9. Central Kalimantan: 78
10. Banten: 73
(Read also: M 4.8 Earthquake Strikes 219 km East of Levuka)
"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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