Tap water in downtown Lanzhou has been found to contain excessive levels of benzene, provincial authorities said on Friday. Tests carried out in the early hours of Friday showed that tap water contained 200 micrograms of benzene per liter, far exceeding the national limit of 10 micrograms per liter, according to the city’s environmental protection office. (Xinhua/Guo Gang) LANZHOU, April 11 (Xinhua) — More than 2.4 million people in downtown Lanzhou, northwest China’s Gansu Province, have been affected by tap water found to contain excessive levels of benzene, provincial authorities said on Friday. Tests carried out in the early hours of Friday showed that local tap water contained 200 micrograms of benzene per liter, far exceeding the national limit of 10 micrograms per liter, according to the city’s environmental protection office. […]