10 Regions with the Least Air Pollution in Indonesia, Lamongan Regency Ranks 1st on Wednesday Afternoon

Lamongan Regency's air quality this afternoon is the cleanest in Indonesia. Based on the air quality index version of the Ministry of Environment and Forestry (KLHK), Lamongan Regency had a score of 14 on Wednesday (5/11/2025) at 4:00 PM WIB.

At that time, Lamongan Regency's air quality was categorized as good, meaning the level of pollutants in Lamongan Regency's air was very minimal. Furthermore, South Lampung Regency took the second position with an air quality index of 16. Next, Tarakan was in the third position with an air quality index of 19.

Here is the complete list of the 10 cities with the cleanest air quality in Indonesia according to KLHK on Wednesday, November 5, 2025 at 4:00 PM WIB.

1. Lamongan Regency (East Java): 14
2. South Lampung Regency (Lampung): 16
3. Tarakan (North Kalimantan): 19
4. Bojonegoro Regency (East Java): 22
5. Sukabumi Regency (West Java): 23
6. Kapuas Regency (Central Kalimantan): 26
7. West Kutai Regency (East Kalimantan): 29
8. Nagan Raya Regency (Aceh): 31
9. Indragiri Hilir Regency (Riau): 32
10. Bulungan Regency (North Kalimantan): 33

(Read: Hit by Floods and Landslides, Here's the Population of Cianjur 2024)

Based on KLHK Regulation No. 14 of 2020 concerning the Air Pollutant Standard Index, KLHK applies 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 Wednesday (5/11/2025) at 4:00 PM WIB, all these cities had good air quality.

(Read: Distribution of Jakarta Flood Points (July 8, 2025 at 07:00 AM WIB))