10 Regions with the Lowest Air Pollution in Indonesia, Madiun Regency Ranks First on Thursday Afternoon

The air quality in Madiun Regency this afternoon is the cleanest in Indonesia. Based on the air quality index from the Ministry of Environment and Forestry (KLHK), Madiun Regency had a score of 14 on Thursday (September 18, 2025) at 4:00 PM WIB.

At that time, the air quality in Madiun Regency was classified as good, meaning the level of pollutants in Madiun Regency''s air was very minimal. Furthermore, West Manggarai Regency ranked second with an air quality index of 19. Next, Tarakan was in third place with an air quality index of 20.

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

1. Madiun Regency (East Java): 14
2. West Manggarai Regency (East Nusa Tenggara): 19
3. Tarakan (North Kalimantan): 20
4. Pangkal Pinang (Bangka Belitung Islands): 22
5. Bontang (East Kalimantan): 23
6. Lumajang Regency (East Java): 25
7. Kapuas Regency (Central Kalimantan): 26
8. Palu (Central Sulawesi): 28
9. Sukabumi Regency (West Java): 29
10. Indragiri Hilir Regency (Riau): 30

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Based on KLHK Regulation No. 14 of 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 Thursday (September 18, 2025) at 4:00 PM WIB, all of these cities had good air quality.

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