10 Regions in Indonesia with the Cleanest Air This Afternoon (18/8)

The air quality in Morowali Regency is the cleanest in Indonesia this afternoon. Based on the air quality index from the Ministry of Environment and Forestry (KLHK), Morowali Regency scored 11 on Monday (August 18, 2025) at 4:00 PM WIB.

At that time, Morowali Regency's air quality was classified as good, meaning the level of pollutants in the air of Morowali Regency was very minimal. Next, Murung Raya Regency ranked second with an air quality index of 14. Following that, Bulungan Regency was in third place with an air quality index of 18.

Here is the complete list of the 10 cities with the cleanest air quality in Indonesia according to KLHK on Monday, August 18, 2025, at 4:00 PM WIB.

1. Morowali Regency (Central Sulawesi): 11
2. Murung Raya Regency (Central Kalimantan): 14
3. Bulungan Regency (North Kalimantan): 18
4. Tarakan (North Kalimantan): 19
5. Ternate (North Maluku): 20
6. Bontang (East Kalimantan): 21
7. West Manggarai Regency (East Nusa Tenggara): 22
8. North Penajam Paser Regency (East Kalimantan): 23
9. Lumajang Regency (East Java): 24
10. Mataram (West Nusa Tenggara): 25

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Based on Ministry of Environment and Forestry Regulation No. 14 Year 2020 concerning the Air Pollution Standard Index, KLHK implements the following air quality index classification.

• 0-50: good
• 51-100: moderate
• 101-200: unhealthy
• 201-300: very unhealthy
• 300+: hazardous

This means that on Monday (August 18, 2025) at 4:00 PM WIB, all of these cities had good air quality.

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