London areas with no water or low pressure today and why there are problems

Thousands of homes in west and south-west London were left without running water or with very low pressure on Wednesday morning.

Thames Water said the problem has been caused by a power supply issue affecting its Ashford and Hampton water treatment works, acknowledging that “a large number of customers have been affected”.

Brixton, Clapham, Lambeth, Chiswick, Richmond, Putney, Wandsworth and Twickenham are among the south-west London areas that have experienced water problems today, with some schools and libraries forced to close.

Which postcodes are affected by Thames Water issues?

Thames Water said the following postcodes (SW, TW and W) are affected:

• SW4
• SW8
• SW9
• SW13
• SW14
• SW15
• SW18
• SW19
• TW1
• TW2
• TW3
• TW4
• TW5
• TW7
• TW8
• TW9
• TW10
• TW11
• TW12
• TW13
• TW14
• TW17
• W1H
• W1M
• W1N
• W2
• W3
• W4
• W6
• W7
• W10
• W12
• W13
• W14

The provider has previously also cited issues with CR, E, EC, KT, N, NW, SE and UB postcodes, but these were subsequently removed from the list.

When will my water return to normal?

A Thames Water spokesperson said: “We’re really sorry to customers in West London who are experiencing low pressure or no water.

“This was caused by a power supply problem which affected our Ashford and Hampton water treatment works in west London. We’re now back in power and expect water supply to return across the day.

“As a precaution, we’re bringing tankers into the area to support local hospitals and critical infrastructure.

“Getting water supplies back on is our top priority and while our team work on this we’re identifying everyone in the affected area who has pre-registered with us as having special requirements, such as being medically reliant on water, so we can get in touch and make sure we give them the help and support they need.”

A Thames Water update at 11.16am stated that hat the power supply at the Ashford Water Treatment Works was back on, and that “supplies should be starting to return across the area”.

It added: “We’re really sorry for the worry and inconvenience this will have caused. We’re working hard to get things back to normal as soon as possible, but it’s likely to take some time for the supply system to refill and for water to fully return to the whole area.”

Thames Water provides advice on what to expect when your supply returns to normal, and advice on what you can do in the meantime, here.