BWSSB’s Water Plan for Bengaluru: What It Means for Homebuyers
BWSSB has outlined plans on Cauvery, rainwater harvesting, leaks and treated water. See what they mean for Bengaluru homebuyers and owners, plus a checklist.
Written by
Justin
15 October 2026 · 5 minutes read
BWSSB’s Water Plan for Bengaluru: What Homebuyers and Owners Should Know
Will your Bengaluru home have enough water next summer?
Imagine a buyer who falls in love with a flat on the city’s edge. The views are lovely, the price is fair, and the sales team mentions that “water is sorted”. Six months after moving in, the building depends on tankers for half the month, and the monthly bill nobody mentioned is large. Water is one of the most overlooked checks in a Bengaluru purchase. The water board’s latest plans show what is being done, and what buyers should still check for themselves.
Quick answer
The Bangalore Water Supply and Sewerage Board (BWSSB) has outlined a mix of short-term and long-term steps: more rainwater harvesting, leak control, treated wastewater for industry, Cauvery Stage V and VI, and later Yettinahole water. These are plans and ongoing projects, not guarantees for any single building. Before you buy, check your own building’s water source, connection, rainwater harvesting and sewage treatment.
What has BWSSB outlined?
Area | What BWSSB has said |
|---|---|
Supply | Cauvery Stage V has been rolled out, Stage VI is being pursued (reported to have Cabinet and Central clearance), and Yettinahole water is expected later |
Rainwater harvesting | About 1,000 structures installed, with expansion planned in government properties, parks, schools and hospitals |
Household conservation | Aerators and reuse, with a push to cut everyday water use |
Leakage | Unaccounted-for water is close to 30%, mostly from the distribution network, so leak detection and control are a priority |
Treated wastewater | Encouraging industries to use treated water from sewage treatment plants (STPs) |
Coordination | Closer work with other civic agencies on road restoration and a shared approach to avoid duplication |
What is the context?
Bengaluru faced severe scarcity in 2024, after poor rainfall depleted groundwater, even though Cauvery supply continued. In July 2026, the BWSSB chairperson warned that the city could face a drinking water shortage within five to six months if rainfall was inadequate, and said the board was monitoring the situation. The newer plans are partly about being ready before the next summer.
What does it mean for homebuyers and owners?
Supply is expanding, but slowly. Large projects such as Cauvery Stage VI and Yettinahole take years.
Connections matter. Reports say that two years after Stage V, only about 35% of targeted households in the 110 villages had come forward for connections. Having a pipeline nearby isn’t the same as having a connection.
Leaks waste a lot. With close to 30% of water unaccounted for, improvements in the network could help over time.
Individual buildings still carry the risk. Rainwater harvesting, treated water use and storage in your building matter in the meantime.
What is still uncertain?
How fast the new projects and leak control will deliver results
Whether rainfall and reservoir levels hold up in future years
How many newer areas will take up piped Cauvery connections
How the plans are coordinated across agencies on the ground
What water checks should a buyer run? (7 steps)
Ask about the water source. Is it a BWSSB Cauvery connection, borewells, tankers, or a mix?
Ask for the BWSSB connection details and confirm the water and sewerage connection is in the builder’s or society’s name, with no dues.
Ask about tanker use. Find out how many tanker trips a month the building needs in summer, and the monthly cost.
Check the borewells. Ask when they were drilled, the current yield and any history of drying up.
See the rainwater harvesting system. Check that it exists, works and was part of the approved plan.
See the sewage treatment plant if the building has one. Check it runs and that treated water is reused for flushing or gardening.
Check storage: sump and overhead tank capacity, and whether water quality is tested.
What should Bengaluru buyers check on top of this?
Location: areas on the city’s edge may depend more on borewells and tankers, so ask residents there about summer supply.
Maintenance costs: water-related costs (tankers, treatment, pumping) show up in your monthly maintenance, so ask for the last 12 months of figures.
The completion papers: check the occupancy certificate and the builder’s compliance on water and sewage systems, as in our builder handover guide.
Resale: reliable water is a selling point, and shortage is a discount.
Papers: verify title and approvals, as in our legal opinion guide.
Frequently asked questions
What is BWSSB’s plan to prevent water scarcity in Bengaluru?
It combines new supply (Cauvery Stage V and VI, and later Yettinahole), more rainwater harvesting, leak control, treated wastewater for industry and better coordination between agencies.
How much water does Bengaluru lose to leaks?
BWSSB estimates unaccounted-for water at close to 30%, mostly from leaks in the distribution network.
Is Cauvery Stage V completed?
BWSSB says Stage V has been rolled out, helping the city’s periphery and reducing dependence on groundwater. Stage VI is being pursued.
Does a Cauvery pipeline nearby mean my building has water?
Not automatically. You still need a connection, and reports say uptake in newer areas has been slow. Ask about your building’s connection and storage.
Is rainwater harvesting compulsory in Bengaluru?
Bengaluru has rules requiring rainwater harvesting for many buildings. Ask the builder or society whether it is installed and working, and confirm the current rules with BWSSB.
What water questions should I ask before buying a flat?
Ask about the source, the BWSSB connection and dues, summer tanker use, borewell yield, rainwater harvesting, the STP and storage capacity.