Misconnected sewers
If you have a misconnected sewer, dirty water from your home could be draining into the wrong sewer, causing pollution to local rivers and beaches.
Around 500,000 properties in the UK have a misconnection, so it’s important to check your home’s drainage has been done right – especially if you have recently had work done to your property.
What is a misconnected sewer?
Many homes have separate drainage systems for surface water (rainwater) and wastewater – this is likely if your property was built after 1920.
A misconnection occurs when a wastewater pipe is wrongly connected to the surface water sewer, resulting in wastewater going directly into and polluting a river or stream.
Many appliances can cause a misconnection, including toilets, showers, sinks, washing machines and dishwashers.
How to check for misconnections
You may have a misconnection if:
- your property has been extended or altered
- a new appliance, kitchen or bathroom has been installed
- your wastewater drainage has been connected to rainwater downpipes
- a washing machine, toilet or sink has been installed in a garage or outbuilding.
Learn more about how to check for misconnections on Water UK's website.
What to do if you have a misconnection
If you own the property, you are responsible for correcting the drainage, even if the misconnection was made by a previous owner.
You should contact an approved plumber or drainage contractor if you think you have one.
If you rent the property, you should contact your landlord who is responsible for correcting it.