Mogden Upgrade Finally Finished

Last Drop-In Session on Monday, with cakes


Thames Water Customer Services - Mogden Line (24hr/day): 0845 641 0030

Mogden is the second largest Sewage Treatment Works in the UK, serving 1.9 million people.  For more information please visit our website at

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Mogden Residents' Action Group (MRAG)

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We are pleased to confirm that Mogden’s £140 million upgrade is now complete and the extension is up and running.

On behalf of the team, I’d like to say a big thank you for your patience and understanding throughout this important project.

This has boosted the site’s sewage treatment capacity by 50 per cent, which in turn will help to significantly improve water quality in the River Thames.

The project team are set to remain at Mogden until the end of June to carry out the necessary fine tuning of the new works. This is just to ensure it runs seamlessly with the existing site and to make any final tweaks.

You will notice that the embankment is nearly at its final shape. Unfortunately the past few months of wet weather has affected progress at the northern end of the mound, and this has meant a few temporary piles of soil have remained near the mature oak trees. Now the weather is looking better, we can finish off this work over the next few weeks.

We have been able to start seeding the embankment, and also plan to complete this by the end of the month. We will be introducing a variety of herb-rich grasses and native wildflowers such as daisies and red campion which will improve the look of the area as we enter the summer.

Overall, we have now planted all of the hedgerows on the embankment and a third of the trees and shrubs. This, again, has had to be delayed because of the weather. The remaining trees and shrubs will be introduced in November’s planting season to give them the best chance to get established.

Our last drop-in session

We will be holding our last informal drop-in session, where you can discuss the project with members of the team, on Monday 13 May, from 5pm to 6.30pm. As it’s the last session, we will have cakes available so please come and join us!

The drop-in will be held at Twickenham Stadium and free car parking is available. On arrival, please report to reception at Rugby House Door A, situated in the South Stand, from where you will be directed to the meeting room.

If you have any questions in the meantime, please call 0845 641 0030, quoting ‘Mogden’. Our lines are always open.

Finally, we will be marking the completion of this project with an open day on 22 June. For more details, please look out for our newsletter due out later this month.

Thames Water

May 10, 2013

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