Associated Press: Chinese authorities have turned off the water supply to a district in the northwestern city of Lanzhou after excessive levels of a toxic chemical were found in tap water. The official Xinhua News Agency said Friday that tests conducted by environmental officials in Lanzhou showed that tap water there contained 200 micrograms of benzene per liter — 20 times the national limit. Xinhua said that the water supplier was a Chinese subsidiary of the French company Veolia Water and that it provided water…

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