THE Jinze Reservoirhas started supplying cleaner water today to some 6.7 million residents in Shanghai’s suburban districts and also to serve as a main backup water source for downtown residents.

About one-fourth of Shanghai residents in southwest suburbs can gradually get to use cleaner water supplied by the new reservoir within a month which started operation today.

The city's vice mayor Chen Yin triggered an operating arm together with other city officials today during a ceremony.