French water treatment company Veolia, the main water supplier in Lanzhou, told state-run Xinhua news agency that the polluted water might be caused by local petrochemical companies.
Kampuni ya matibabu ya maji ya Ufaransa Veolia, mlanguzi mkuu wa maji katika Lazzhou, aliliambia shirika la habari la taifa-run Xinhua kwamba maji yaliyochafuliwa yaweza kusababishwa na makampuni ya kemikali ya mahali hapo.