SHANGHAI has 1,864 polluted and smelly waterways that must be cleaned by the end of the year, Shanghai Mayor Ying Yong said yesterday.

The city’s cleanup campaign will not only improve water quality, but also pre­vent it from being polluted again, Ying said in a radio interview to address public concerns.

The waterways or river sections were identified during a survey carried out since late last year and are part of a total of 26,000 waterways in the city.