Data on water contamination reveals Colaba, Cuffe Parade, Fort has most polluted water supply, Kandivali safest.
According to BMC data, percentage of water contamination in the city fell from 4.31 per cent last year to 3.34 per cent now.
Meanwhile, Kandivali recorded the least contamination, at 0.34 per cent.
In terms of the presence of E. Coli in the samples collected, Malad fares best with no recorded instance of the bacteria.
Andheri East comes next with 0.08 per cent and Kandivali with 0.09 per cent.
In 2012-13, 19 per cent of the total water samples collected from around the city had been termed ‘unfit’.
However, the numbers have gone down since with the city recording 10.84 per cent contamination in 2013-14 and 3.87 per cent in 2014-15.
“Every year, we undertake work on replacement of old pipelines, which are prone to leaks.
Additionally, whenever the roads department is undertaking repair work or trenches, we ensure we check our water mains and repair them if required,” said A S Tawadiya, chief engineer of the Hydraulics Department.
Further, the department has also cracked down on ‘bunch connections’ in slums.