Chennai, like many other cities, has multiple water treatment plants to provide clean and safe water to its residents. Some of the significant water treatment plants in Chennai include:

Kilpauk Water Treatment Plant: This is one of the largest water treatment plants in Chennai, with a capacity of 100 million litres per day. It provides water to the central and northern parts of the city.

Nemmeli Desalination Plant: This plant is located on the East Coast Road and is the largest desalination plant in India. It has a capacity of 100 million litres per day and supplies water to the southern part of the city.