Residents of a quiet residential pocket in Lingarajapuram recently faced a frightening reality when their drinking water turned foul-smelling and unsafe. What began as complaints of bad-tasting water soon escalated into cases of water-borne illnesses, forcing authorities to investigate urgently. The cause, uncovered through robotic inspection, has highlighted a much larger problem affecting many older parts of Bengaluru.
Water Contamination Sparks Alarm in Lingarajapuram
Over the past few weeks, residents of KSFC Layout in Lingarajapuram, especially those living along 3rd B Main Road, began noticing something unusual about their tap water. The water had a strong, unpleasant smell, and several families reported falling sick with stomach-related issues.
As concerns grew, residents raised repeated complaints with the Bangalore Water Supply and Sewerage Board. Given the seriousness of the situation, BWSSB launched a detailed investigation to identify the source of contamination.
Robotic Inspection Uncovers the Root Cause
To accurately trace the problem without extensive digging, BWSSB deployed robotic inspection technology. The inspection revealed a disturbing picture beneath the road.
Officials found that the main drinking water pipeline running through 3rd B Main Road was nearly 40 years old and made of cast iron. Over decades, the pipe had become heavily corroded and weakened by rust.
Even more concerning was the discovery of a leaking sewage connection from one of the oldest houses in the layout. The sewage pipe, made of galvanised iron, had deteriorated badly, allowing sewage to seep into the nearby drinking water pipeline.
How Sewage Entered the Drinking Water Line
Engineers explained that both the sewage line and the water pipeline were laid next to each other when the layout was first developed several decades ago. At the time, galvanised iron and cast iron pipes were commonly used.
Over the years, the galvanised iron sewage pipe from the old house corroded extensively. As cracks formed, sewage began leaking out. Because the drinking water pipe was also rusted and weakened, the sewage managed to seep into the water supply.
This combination of ageing infrastructure and closely laid pipelines resulted in direct contamination of drinking water supplied to dozens of homes.
Immediate Action Taken by BWSSB
Following the findings, BWSSB moved quickly to address the issue. The ageing cast iron drinking water pipeline along 3rd B Main Road was removed and replacement work began immediately.
The old pipeline is now being replaced with ductile iron pipes, which are more durable, resistant to corrosion, and better suited for long-term use. Officials said this upgrade would significantly reduce the risk of future contamination.
The repair work was taken up on priority and is expected to be completed by Tuesday evening.
Residents Asked to Replace House Connection Pipes
While replacing the main pipeline, BWSSB also advised residents along the affected stretch to replace their individual house connection pipes.
Many of these connections are still made of galvanised iron, the same material responsible for the sewage leak. BWSSB warned that if these old pipes are not replaced now, they could cause similar problems again in the future.
Over 30 households were informed to carry out the replacement during the ongoing work. Officials said this would avoid repeated road cutting later and ensure a safer water supply.
However, residents were told that the cost of replacing their individual connection pipes would have to be borne by them.
Residents Voice Concerns Over Monitoring Failures
The incident has triggered frustration and concern among residents, who questioned why such a serious issue went unnoticed for so long.
Sanjeev Kumar, a resident of the affected lane, expressed his worry. He said residents have no way of knowing how old underground pipes are or when they become unsafe. According to him, regular inspection of drinking water lines should be the responsibility of BWSSB.
He added that while residents are now being asked to replace their connections, the bigger concern is health and safety. Many families are choosing to replace their pipes immediately rather than risk further contamination.
BWSSB Acknowledges Citywide Ageing Infrastructure
BWSSB chairman Ram Prasath Manohar confirmed that the contaminated pipeline was around 40 years old and acknowledged that similar ageing infrastructure exists across Bengaluru.
He stated that once the problem was identified, instructions were given to remove the old pipeline and replace it immediately. He also noted that BWSSB plans to take up replacement of old pipelines in a phased manner across the city.
With many neighbourhoods relying on decades-old water and sewage lines, the Lingarajapuram incident has become a reminder of the urgent need for infrastructure upgrades.
Sanchari Cauvery Tankers Prevent Water Crisis
While repair work was underway, BWSSB ensured that residents were not left without water. The Sanchari Cauvery tanker service played a key role in managing the situation.
From Friday onwards, free Cauvery water was supplied to affected households through tankers. However, residents were first instructed to clean and disinfect their overhead tanks and sumps to prevent further health risks.
Officials said tanker supply would continue until clean water starts flowing through the newly installed pipeline.
Fresh Water Expected Soon
According to engineers at the site, once the pipeline replacement is completed, fresh Cauvery water will be released into the new network. BWSSB assured residents that water quality would be closely monitored before regular supply resumes.
Residents were also advised to flush their internal pipelines thoroughly once water supply is restored.
A Wake-Up Call for Older Neighbourhoods
The Lingarajapuram contamination incident has raised important questions about the condition of Bengaluru’s underground infrastructure. Many older layouts across the city still depend on pipes installed decades ago, often without regular inspection or timely replacement.
Experts say proactive monitoring, modern inspection tools like robotics, and phased infrastructure upgrades are essential to prevent similar incidents elsewhere.
For now, residents of KSFC Layout hope the new pipelines will bring relief and restore confidence in their drinking water. But the larger challenge remains: ensuring safe, clean water for a city that continues to grow while relying on ageing systems beneath its roads.
