The items that are flushed down sinks and toilets can block pipes and cause pollution. This page shows the impact on our network and our homes.
These blockages – from fat, oil and grease or from unsuitable items being flushed away – can have a harmful effect on our environment.
This could be sewer flooding in your neighbourhood or pollution in local streams, like in the image above.
Washing machines, toilets and other items may be plumbed incorrectly in some homes, meaning dirty water and other waste is sent directly to streams and rivers instead of to treatment works to be cleaned. Find out more below.
Reducing the risk of blockages in our sewers is a major part of our Business Plan for 2015–20. Read more about the plan below.
Our contractors regularly send cameras into our sewers to find the cause of fat blockages. The film below shows this in action in a sewer in Kent.