10 Regions with the Least Air Pollution in Indonesia, Kutai Barat Regency Ranks 1st on Sunday Afternoon

The air quality in Kutai Barat Regency this afternoon is the cleanest in Indonesia. Based on the air quality index version of the Ministry of Environment and Forestry (KLHK), Kutai Barat Regency has a score of 5 on Sunday (January 11, 2026) at 4:00 PM WIB.

At that time, the air quality in Kutai Barat Regency was categorized as good, meaning the level of pollutants in the air of Kutai Barat Regency was very minimal. Furthermore, Gresik occupies the second position with an air quality index of 13. Next, Malang is in third place with an quality air index of 14.

Here is the complete list of the 10 cities with the cleanest air quality in Indonesia according to KLHK on Sunday, January 11, 2026, at 4:00 PM WIB.

1. Kutai Barat Regency (East Kalimantan): 5
2. Gresik (East Java): 13
3. Malang (East Java): 14
4. Ternate (North Maluku): 20
5. Sukabumi Regency (West Java): 22
6. Probolinggo (East Java): 23
7. Murung Raya Regency (Central Kalimantan): 26
8. Rembang Regency (Central Java): 27
9. Bontang (East Kalimantan): 28
10. Asahan Regency (North Sumatra): 29

(Read: Indonesia, Country with the Worst Air Quality in Southeast Asia)

Based on KLHK Regulation No. 14 of 2020 concerning the Air Pollutant 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 Sunday (January 11, 2026) at 4:00 PM WIB, all these cities had good air quality.

(Read: Jakarta's Air Quality is Poor, Losing to Other ASEAN Capitals)