Serving parts of North West London and the Home Counties.

Water quality

We are committed to supplying high quality drinking water, and providing an excellent service to our customers and communities.

Our Catchment Management team works proactively to identify the source of pollution and regularly monitors the rivers and groundwater in our communities.

Our treatment facilities use some of the latest technology and sophisticated monitoring systems to ensure we provide water of a high standard whenever you turn on your tap.


This section will give you advice on problems with your water quality, information on water quality to your property and advice to help maintain the quality of drinking water in your home.


Looking after water in your home 

WaterUK, who represent all UK water and wastewater service suppliers at national and European level, has produced a consumer guide ‘Looking After Water in Your Home’ which shows how to keep water in top condition and avoid problems that can affect taste and odour.