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Newbarrackpur, Kolkata 700131, India
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Lavanyamati river turning into poisonous Noai canal!

The North 24 Parganas district of West Bengal is part of the Ganga-Brahmaputra delta. This extremely fertile area has been formed by the silt carried by the Ganga and Brahmaputra. As a result, the land here is flat and low-lying in nature. Many active rivers and tributaries flow through this region.

Earlier this region was a vast land full of canals, wetlands and forests which was directly connected to the Sundarbans of South 24 Parganas through waterways, mangroves and tides. In the delta region, because the flow of rivers slows down and changes course from time to time, huge wetlands and water bodies are often created.

One such wetland is the Vartir Beel of Barasat, which in ancient times had an area of two and a half lakh square kilometers. From these wetlands, rainwater and tidal water used to flow through various natural canals and later through artificial channels made during the British period, and merge with the larger rivers.

At present the Lavanyamati river / Noai canal is one such connecting water transport system, where due to the presence of tidal movement and potable water, settlements grew along the riverbanks.


Collapse After Partition

The British used these canals or small rivers as a drainage system and also for transporting rice and jute produced in this fertile region. But after Partition, this system completely collapsed.

Millions of refugees from the new country East Pakistan came and settled here, and various slum areas developed along these canals, rivers and railway lines. Overnight, due to the pressure of heavy population, the local agricultural system declined and agricultural land decreased.

Various small cottage industries appeared such as vest factories. The polluted water from these factories and all the garbage of the slum dwellers were dumped into the Lavanyamati river / Noai canal.

A severe environmental degradation began, which continues to worsen every day.

Now this polluted river or canal has become normal in our eyes.


Municipal Pollution Load

This 35 kilometer long Lavanyamati river / Noai canal now receives polluted water from six municipalities:

  • Barrackpore
  • Panihati
  • Khardah
  • New Barrackpore
  • Madhyamgram
  • Rajarhat Gopalpur

It also receives waste from gram panchayats such as: Amdanga, Suli, Nilganj, Ichhapur, Rajarhat, Bilkanda and Chandigar.

This river now functions as the dirty drainage system of a sixty-five square kilometer area.


A Political and Social Question

Any ruling government remains too busy every five years with four elections, so even if there is some intention to work, they do not get time to look into this matter.

Because rivers, canals and trees do not vote.

And the local youth are busy with the desire to become rich very quickly by overtaking everyone. With the desire to prove themselves different from others. With the desire to pretend false victory even after falling behind in the rat race.

Do they have time to look towards these rivers and canals?

Frequently Asked Questions
The Lavanyamati River was a natural river system in North 24 Parganas district of West Bengal that functioned as an important water channel connecting wetlands, canals and larger rivers within the Ganga-Brahmaputra delta.
Over time the natural river lost its ecological character due to pollution, encroachment and drainage usage. As a result, the Lavanyamati River gradually turned into a polluted drainage canal locally known as the Noai Canal.
The region is part of the Ganga-Brahmaputra delta where fertile silt deposits from the rivers created flat and low-lying land. Slow-moving river flows and shifting courses often formed wetlands, canals and large water bodies.
Wetlands such as Vartir Beel stored rainwater and tidal water which then flowed through natural and artificial canals before merging into larger rivers, helping maintain the natural drainage and ecological balance of the region.
During the British period, canals and small rivers were used as transportation routes for agricultural products such as rice and jute and also functioned as natural drainage channels for the region.
After the Partition of India in 1947, large numbers of refugees from East Pakistan settled along canals, railway lines and riverbanks. Rapid urbanization, slum development and unplanned settlements disrupted the traditional water management system.
Small cottage industries such as vest manufacturing units discharged polluted water into the river. Along with industrial waste, household garbage from surrounding settlements also contributed to severe water pollution.
The Noai Canal currently receives wastewater from six municipalities: Barrackpore, Panihati, Khardah, New Barrackpore, Madhyamgram and Rajarhat Gopalpur.
Several gram panchayat areas including Amdanga, Suli, Nilganj, Ichhapur, Rajarhat, Bilkanda and Chandigar also discharge waste into the canal.
The Noai Canal currently acts as the drainage system for approximately sixty-five square kilometers of urban and rural areas.
Environmental degradation has continued due to unchecked urban expansion, industrial pollution, lack of proper waste management systems and insufficient long-term policy attention toward river restoration.
River restoration requires coordinated governance, public awareness and environmental planning. However, political priorities often focus on short-term electoral issues rather than long-term ecological concerns.
The pollution has destroyed aquatic ecosystems, reduced water quality, increased health risks for nearby communities and transformed a natural river system into a contaminated drainage channel.
Possible restoration steps include sewage treatment infrastructure, strict control of industrial discharge, wetland conservation, removal of encroachments and community-driven environmental awareness initiatives.

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