A network of reservoirs has been built for storing surface water from New Town water treatment plant. From second week of March, Bidhannagar Municipal Corporation (BMC) can store potable water in these tanks and supply clean, iron-free surface water to Salt Lake.
Salt Lake, with 11 million gallons summer requirement, still draws three million gallons groundwater that’s mixed with the 7.5 million gallons of treated water from Tallah plant. “From March, ground water may be used only during emergencies. It won’t be mixed with the surface water any more,” said Swapan Maitra, executive engineer, PHE and PWD. “When the reservoirs start storing, residents will get surface water stored in the new reservoirs 24X7,” Maitra added.
The quality of water supplied to a large section of Salt Lake households has improved over the years. The focus should now be on parts of southeast Kolkata, where the population has increased significantly over the last couple of decades. A lot of neighbourhoods have been added to the treated-water grid but a large population remains off this network. This must be addressed quickly.
Initially, the water treatment plant will supply around 20 million gallons a day (MGD) and another 20 MGD by July. From March, Salt Lake will get 6 MGD of this and from July, it will get 14.5 MGD. “There will be more potable water than needed. We appeal to residents to use water judiciously,” Maitra said. KMDA has spent Rs 115 crore for the tanks and pipelines.
Two new reservoirs have been built next to Tank 13. The second one has a capacity of four million gallons. Two other overhead reservoirs are there in Rajarhat’s Ward 26. A fourth underground reservoir, capable of storing three million gallons, has come up beside Tank 5. Treated water from New Town can be stored in the new reservoirs, which can pipe 11 million gallons to Salt Lake and two million gallons to Rajarhat.
Due to the flow of iron water through pipelines, every summer Salt Lake residents complain about water crisis. But it’s actually the choked ferrules that affect water flow.
“Commissioning of the New Town plant will end water woes in Salt Lake provided there’s proper storage,” mayor Krishna Chakraborty said.
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