Surabaya had the cleanest air quality in Indonesia this morning. According to the air quality index from the Ministry of Environment and Forestry (KLHK), Surabaya scored 25 on Thursday, September 21, 2023, at 6:00 AM WIB.
At that time, Surabaya's air quality was categorized as "good," meaning pollutant levels in the air were very minimal. Tanjung Pinang was ranked second with an air quality index of 26. Gorontalo followed in third place with an air quality index of 27.
Below is a complete list of the 10 cities with the cleanest air quality in Indonesia according to the KLHK on Thursday, September 21, 2023, at 6:00 AM WIB.
1. Surabaya (East Java): 25
2. Tanjung Pinang (Riau Islands): 26
3. Gorontalo (Gorontalo): 27
4. Kupang (East Nusa Tenggara): 30
5. Sanggau (West Kalimantan): 37
6. Malang (East Java): 39
7. West Kotawaringin (Central Kalimantan): 40
8. East Tanjung Jabung (Jambi): 43
9. Kendari (Southeast Sulawesi): 46
10. Banda Aceh (Aceh): 48
Based on the Minister of Environment and Forestry Regulation No. 14 of 2020 concerning the Air Pollutant Standard Index, the KLHK applies the following air quality index classification:
* 0-50: Good
* 51-100: Moderate
* 101-200: Unhealthy
* 201-300: Very Unhealthy
* 300+: Hazardous
Therefore, on Thursday, September 21, 2023, at 6:00 AM WIB, all of the aforementioned cities had good air quality.