---
Referensi:
Statista. (2023). "Average Monthly Household Expenditure on Bottled Water in Indonesia 2023." Statista. Retrieved from [Statista.com](https://www.statista.com)
World Bank. (2022). "Indonesia's Middle-Class Aspiration: Challenges and Opportunities." World Bank Group. Retrieved from [Worldbank.org](https://www.worldbank.org)
Kementerian PUPR. (2023). "Upaya Peningkatan Kualitas Air PAM di Indonesia." Kementerian Pekerjaan Umum dan Perumahan Rakyat. Retrieved from [PUPR.go.id](https://www.pupr.go.id)
Kompas. (2023). "Biaya Hidup di Kota Besar: Air Minum dan Pengeluaran Rumah Tangga." Kompas.id. Retrieved from [Kompas.id](https://www.kompas.id)
Baca konten-konten menarik Kompasiana langsung dari smartphone kamu. Follow channel WhatsApp Kompasiana sekarang di sini: https://whatsapp.com/channel/0029VaYjYaL4Spk7WflFYJ2H
