Serving parts of North West London and the Home Counties.

Waste Water

Although we supply your water, we are not responsible for processing your waste water. For customers living in the Central or East regions, we collect the charges on behalf of Thames Water or Anglian Water. Customers living in the Southeast region will be billed separately by Southern Water

If you have a query about your waste water or if water from sewers is affecting your home please contact your sewerage provider directly.

To find out who your sewerage provider is please use the search at the bottom of the page or click on the waste water area map.


Waste water reductions

Some sewerage companies offer reductions for waste water (water from sinks, toilets, baths etc.) or Surface Water (water that goes into drainage from rain or snow falling on your property). This reduction is given by your waste water company who will notify us to apply the reduction to the sewerage part of the bill. We cannot change your bill until we receive confirmation from them.

If your waste water or surface water does not go into the main drainage system, i.e. you have a septic tank or your own waste management system, the waste water companies may not charge you. The reduction is at their discretion and please contact them to enquire. They may ask you to confirm current charges on your bill.


Surface water abatement

There are some circumstances where you may not need to pay the full amount of your sewerage charges.

If the rain water falling on your property does not go into the main drainage system, if it goes into a soak-away for example, you could apply for a surface water abatement. Please contact your waste water company.


Waste water abatement

Thames Water 

If there is a difference between the amount of water you use and the amount of effluent you discharge into the sewer system, for example water used to irrigate plants. Thames Water may grant a wastewater abatement allowance, which takes these differences into consideration. Customers will need to prove that over ten per cent of their metered water usage is not returned to the sewer for treatment and you should contact them on the details above.

Anglian Water 

For domestic customers, Anglian Water already allow 10% for water that does not go into the main drainage system, for metered customers, this means that usage shown by your meter readings will be used in full for water charges but only 90% of the usage will be used for waste charges. 

If you are a business customer or can demonstrate that less than 90% of your water is returned to the main sewer, you should contact Anglian Water directly to discuss whether a higher allowance is appropriate for you.  


Drainage and waste water fittings

The ConnectRight campaign aims to prevent misconnections and raise awareness about drainage and water pollution amongst property owners, the public and professionals.

For more information click the link for ConnectRight or contact your local WaterSafe recommended plumber.

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To use the search please enter your complete postcode, for example, AL10 9EZ.