BWSSB to Power Cauvery stage VI pumping stations with solar energy

The water utility plans solar-powered pumping stations to cut electricity costs and support Bengaluru’s expanding water needs.

The Bangalore Water Supply and Sewerage Board (BWSSB) is preparing to introduce solar energy into its major water infrastructure, with new pumping stations under the Cauvery Stage VI project set to be powered partially or fully by solar systems. The utility has finalised a Detailed Project Report (DPR) outlining four such stations, with an estimated budget of ₹20 crore.

The Cauvery Stage VI project is designed to supply drinking water to fast-growing regions on the outskirts of Bengaluru. Areas such as Nelamangala, Devanahalli, Hosakote, Chikkabanavara and nearby satellite towns will be brought under the network, significantly expanding the city’s water coverage.

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BWSSB is now evaluating options for sourcing renewable energy. The plans include either establishing its own solar plants or entering long-term purchase agreements with independent solar energy producers. The final decision will depend on financial feasibility and long-term operational sustainability.

Power expenses remain one of the utility’s biggest financial burdens. BWSSB currently spends nearly ₹60 crore annually on electricity to operate its pumping and treatment systems. Officials estimate that transitioning to solar energy could reduce power costs by at least ₹1 per unit, offering substantial savings over time. The agency is also exploring solar adoption for other existing water supply systems across Greater Bengaluru.

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The move toward solar-powered pumping is expected to ease operational costs, strengthen the reliability of the Cauvery Stage VI project, and support Karnataka’s broader push toward clean energy solutions.