Thousands of homes in Dulwich wake up to dry taps after a weekend of pipe failures
Homes across south-east London are starting the week with low water pressure or no water at all, after multiple leaks sent floodwater pouring through streets around Dulwich and left Thames Water scrambling to keep its customers supplied.
The company said households in the SE21, SE22 and SE23 postcode areas could be affected by the problems, which emerged across several sites in the Dulwich area. Leaks have been reported on Lordship Lane, on London Road near the Horniman Museum, and on Dulwich Common — with street flooding and damaged road surfaces disrupting parts of the local road network.
Key facts
- What: Multiple water main leaks causing low water pressure and interruptions to supply.
- Where: The Dulwich area of south-east London — Lordship Lane, London Road near the Horniman Museum, and Dulwich Common. Customers in SE21, SE22 and SE23 may be affected.
- When: Ongoing since Saturday 11 October 2026. Thames Water says another update is expected by 11am on Monday 12 October.
“Sorry if you’re experiencing low water pressure or no water supply”
In a statement issued at 12.40pm on Saturday, Thames Water apologised to customers and said specialist teams were on site investigating the leaks, supporting residents affected by flooding, and planning the repairs needed to get the network back to normal.
“We’re sorry if you’re experiencing low water pressure or no water supply. We’re aware of multiple leaks affecting the Dulwich area, including Lordship Lane, London Road near the Horniman Museum, and Dulwich Common. Customers in SE23, SE22 and SE21 may experience low pressure or interruptions to their water supply. Our specialist teams are on site investigating the leaks, supporting customers affected by flooding, and planning the necessary repairs. We’re prioritising keeping customers in supply while working to reduce flooding and minimise disruption. We’ve been moving water around our network to help keep customers in supply during this incident. Traffic management measures are also in place to protect residents and road users from hazards caused by flooding and damage to road surfaces. We know how disruptive it is if you lose your water supply, so we’ll work hard to get things back to normal as soon as we can.”
— Thames Water, 12.40pm, Saturday 11 October 2026
Crews moving water around the network to keep taps running
The company said keeping customers in supply remains its priority while repairs are planned, and that it has been moving water around its network to try to maintain pressure during the incident. Traffic management measures are in place to protect residents and road users from the hazards caused by flooding and damage to road surfaces.
Despite those efforts, Thames Water has warned that some households may continue to experience low water pressure or interruptions, and that its teams are working to resolve the situation as safely and as quickly as possible.
It is the latest in a series of supply problems to hit the capital this year. Londoners have already endured low pressure and outages in south-west London, and a burst water main in south London that left residents without water for a second week.
What to do if your water is off
If you are affected, Thames Water advises customers to check its live outage map online for the latest position in their area, and to contact its helpline if they need support. The company says further updates will follow as the investigation and repair work continues, with the next expected by 11am tomorrow.
London Streets will update this story as more information becomes available.
Thames Water said traffic management measures would stay in place around the affected streets to protect residents and road users from hazards caused by flooding and damage to road surfaces.
