Analysis of chromium(IV) levels in residents’ well water around the Citarum River, Indonesia: Bahasa Indonesia - Baehaki, Farhan; Wahyudin, Yasser; Perdana, Ryzal; Nurfajar, Arlisya Siti; Syaripudin, Zidni Irpan (Journal of Sustainability Science and Technology, 2021)