Surabaya had the cleanest air quality in Indonesia this afternoon. According to the air quality index from the Ministry of Environment and Forestry (KLHK), Surabaya scored 22 on Monday, September 11, 2023, at 4:00 PM WIB.
At that time, Surabaya's air quality was categorized as "good," meaning pollutant levels in the air were very minimal. Kupang was ranked second with an air quality index of 25. Semarang followed in third place with an air quality index of 28.
Below is a complete list of the 10 cities with the cleanest air quality in Indonesia according to the KLHK on Monday, September 11, 2023, at 4:00 PM WIB.
1. Surabaya (East Java): 22
2. Kupang (East Nusa Tenggara): 25
3. Semarang (Central Java): 28
4. Manado (North Sulawesi): 35
5. Balikpapan (East Kalimantan): 36
6. Bulungan (North Kalimantan): 40
7. Ternate (North Maluku): 41
8. Denpasar (Bali): 45
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
This means that on Monday, September 11, 2023, at 4:00 PM WIB, all of the aforementioned cities had good air quality.