An NMC official said, “The water received from the rains is dirty. We
use liquid alum on a large scale to purify this water. Around 2,000 to
2,500 metric
tonnes of liquid alum is required for this purpose. 2,000 metric tonnes
of liquid alum will be purchased for the financial year 2013-14. It is
estimated to cost Rs. 1.37 crore. The liquid alum will be procured from
private firms through tender processes. An e-tender has already bee.”

The NMC’s proposal to buy 2,000 metric tones of liquid alum was passed
at NMC’s General Body Meeting held last month. Last year, the civic
administration procured around 2,200 metric tonnes of liquid alum for
water purification.

NMC uses liquid alum to purify water at its
five water filtration plants – Bara Bungalow water filtration plant,
Shivaji Nagar water filtration plant, Panchavati water filtration plant,
Gandhinagar
water filtration plant and Nashik road water filtration plant. Around
350 million litres (MLD) of water is supplied to the city from these
five water filtration plants everyday.