South Kolkata towers on tubewells
Many high-rises in Behala, Joka, Tollygunge, Jadavpur and Garia still lack treated Garden Reach supply and rely on groundwater; one Joka complex of about 1,875 flats is reported to be entirely groundwater-dependent. City groundwater ranges from fresh to brackish, with high hardness, iron and occasional arsenic and manganese. KMC has planned a new 40 MGD plant at Garden Reach for these areas, but no completion date has been announced.
How we fix it
We start with a water test and build the train it calls for: multigrade and iron-removal filters, a softener for hardness, and an RO stage for drinking water, with the RO controller watching quality and pressure.