Where is there a lot of water pollution?

the top ten are (not in order) 1. Dzerzinsk, Russia 6.Chernobyl, Ukraine 2. Linfen, Shanxi, Province, China 7.La Oroya, Peru 3.Kabwe, Zambia 8.Ranipet, India 4.Norilsk, Russia 9.Rudnaya Pristan and Daneorsk, Russia 5.Haina, Domimican Republic 10.Mailuu-Suu, Kryrgyzstan