The Coimbatore Corporation has revised its earlier proposal to establish multiple sewage treatment plants (STPs) along the Noyyal river bund.
Instead, the Corporation now plans to construct a single STP and divert sewage through interception and diversion systems to existing treatment facilities at Ukkadam, Nanjundapuram, and Ondipudur.
According to officials, sewage intercepted at various points along the river will be directed into a well and pumped to the existing STPs. This revised approach is expected to reduce the operational and maintenance costs associated with managing multiple smaller units. Approximately 50 million litres per day (MLD) of sewage is proposed to be redirected through this system.
In locations where diversion is not feasible, a separate 15 MLD STP is proposed. The total cost of these measures is estimated at ₹100 crore.
As part of preparatory work, the Corporation has completed boundary marking of the Noyyal river and installed boundary stones along the 18.5-km stretch within the city limits.
