South East Rivers Trust (& the Wandle Trust)

Hogsmill hit with sewage again

We are sorry to say that Thames Water has been in touch to notify us that an incident took place on Saturday 27th January 2018, in which sewage sludge from the Hogsmill Sewage Treatment Works was released into the Hogsmill river. Sewage sludge is one of the final products from the sewage treatment process and so it does not contain any rag.

This is particularly concerning given that it follows our report of the Epsom and Ewell Storm Tanks overflowing settled effluent into the top of the river last week.

We understand that Thames Water has been working through the night to minimise the impact and has provided us with the following statement.

We’ve stopped a spillage at our Hogsmill treatment works, and are working closely with the Environment Agency to clean up the area. We are very sorry that not all of the spillage has been contained on the site, and a full investigation is now underway.” – Anthony Crawford, Head of Wastewater Control, 28th January 2018

We don’t think that there have been any reports of wildlife in distress, although It is thought that ammonia and ammonium levels were elevated downstream of the sewage works during the incident. Thames Water is continuing to investigate whether there might have been any further impacts.

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