According to a study by the Atma Jaya Catholic University of Indonesia in 2008, the share of the water bill in the income of a poor family (tariff Category II) was 2.8 percent.
Menurut penelitian Universitas Katolik Atma Jaya Indonesia tahun 2008, porsi tagihan air dalam anggaran keluarga miskin (tarif Kategori II) sebesar 2,8 persen.