Chennai Metrowater ramps up sewer upgrades to reduce pollution in waterways

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A presumption    of the recently  constructed 4MLD Modular Sewage Treatment Plant astatine  Todd Hunter Nagar successful  Saidapet connected  Tuesday.

A presumption of the recently constructed 4MLD Modular Sewage Treatment Plant astatine Todd Hunter Nagar successful Saidapet connected Tuesday. | Photo Credit: VELANKANNI RAJ B

In a propulsion to trim sewage contamination successful metropolis waterways, Chennai Metrowater has stepped up efforts to upgrade sewer infrastructure and physique further roadside sewage pumping stations and modular sewage attraction plants.

Residents noted that portion sewage outflow and blocks person eased successful areas that underwent caller betterment works, concerted efforts are needed to guarantee cleaner insignificant canals successful the city.

This year, the h2o bureau has identified astir 518 sewage outfalls successful the Adyar stream wrong metropolis limits and is moving to plug them successful phases. While projects are successful spot to plug 29 outfalls, 250 sewage outfalls would beryllium arrested done works projected nether Adyar River Restoration Project, which volition beryllium executed utilizing hybrid annuity model.

Similarly, 365 sewage outfalls person been identified successful Buckingham Canal, and 3 of them person been plugged truthful far. Of this, astir 128 are adust outfalls wherein wastewater is discharged during summer. Of the 201 outfalls successful the Cooum river, astir 41 of them person been arrested truthful far.

Residents of Kodambakkam and MGR Nagar noted that the recurring occupation of sewage overflow has reduced aft sewer infrastructure was improved. V. Gopalakrishnan of MGR Nagar said sewage continues to find its mode into insignificant canals similar MGR Canal and Trustpuram Canal.

While aged sewer lines person been replaced successful areas similar Devar Nagar to forestall collapses, P. Boominathan of Anna Nagar West Extension said that stringent enactment and much projects are needed to halt sewage entering canals starring to Cooum river, including Padikuppam drain.

Officials of the Metrowater said the quantity of sewage collected and treated done the web has accrued from 600 cardinal litres a time (mld) successful 2024 to 675 mld successful the metropolis done assorted initiatives. The ongoing efforts are expected to further trim sewage travel into waterways.

According to Metrowater, astir 23 roadside sewage pumping stations person been added to assorted localities, including Pillaiyar Koil Street, Kodambakkam and Madhavaperumal West Street, Alandur. These facilities would enactment arsenic assistance stations, conveying sewage from low-level postulation points to main sewage pumping stations and preventing sewage outflow.

In caller months, the h2o bureau has besides added 38 caller sewage pumping stations with improved pumping capableness successful areas similar Aminjikarai and Trustpuram. Modular sewage attraction plants person been added successful Chetpet, Kundrathur, Choolaimedu, Todd Hunter Nagar, Maduravoyal and Kotturpuram, with the installation successful Todd Hunter Nagar built with a larger capableness of 4 mld.

With a extremity to forestall contamination into waterways and guarantee that maximum quantity of sewage reaches STPs, Metrowater has besides laid lines to intercept and divert sewage flowing into waterways, including successful Chintadripet, Adyar, Kotturpuram , Ekkaduthangal, Nandambakkam and Jafferkhanpet. Similar works were carried retired successful places similar Mehta Nagar and Anna Nagar nether the Integrated Cooum Eco-Restoration project.

Besides improving sewage pumping stations successful respective areas, including Ice House and Namachivayapuram, aged sewer lines person been replaced with pipes of larger capableness for a magnitude of 247 km. Additional sewer lines person been laid for different 213.4 km successful halfway and added areas arsenic portion of the ₹385.38 crore worthy projects to fortify the infrastructure. Some of the works to regenerate sewer web successful Nesapakkam and Saidapet are nether progress, officials said.

Published - November 18, 2025 07:36 p.m. IST

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