Local authorities in Lanzhou have warned residents against drinking tap water due to an outbreak of severe pollution in its water supply, prompting scenes of frantic bottled water purchases across the city's supermarkets. 
Mamlaka ya jiji la Lanzhou imetoa angalizo kwa raia wake la kutokutumia maji ya bomba kutokana na maji hayo kugundulika kuchanganyikana na kemikali hatari, hali iliyopelekea maji ya viwandani kugombaniwa katika maduka mbali mbali ya jiji.