Your browser is no longer supported

For the best possible experience using our website we recommend you upgrade to a newer version or another browser.

Your browser appears to have cookies disabled. For the best experience of this website, please enable cookies in your browser

We'll assume we have your consent to use cookies, for example so you won't need to log in each time you visit our site.
Learn more

Thames Water to carry out £4M survey of London hotspots following private sewer takeover

Thames Water has launched a £4M pipe surveying project, following its adoption of an estimated 40,000km of private sewers due to a change of law that came into effect on Saturday.

The project is focused on three London hotspots for drain blockages — Leyton, East Ham and Harrow — which are collectively responsible for around 4% of the blockages Thames Water deals with each year. Thames Water asset management director Bob Collington said the findings of the £4M surveying project will be used “to better inform the sewer maintenance work we do across our wider region”.

The change of law at the weekend meant that the ownership of all privately owned private sewers and lateral drains in England and Wales transferred to water companies. However, water experts told NCE that much of this infrastructure had not been comprehensively surveyed, meaning water companies could only estimate the size and state of their new assets.

Thames Water predicted that its new responsibility for private sewers will increase the number of blockages it deals with annually from 55,000 to 250,000.

Have your say

You must sign in to make a comment

Please remember that the submission of any material is governed by our Terms and Conditions and by submitting material you confirm your agreement to these Terms and Conditions. Please note comments made online may also be published in the print edition of New Civil Engineer. Links may be included in your comments but HTML is not permitted.