We supply top quality drinking water to more than one million households every day.

About 70% of water supplies in our region are taken from underground sources (groundwater*) predominately chalk* but also greensand* sources. The remainder comes from rivers and storage reservoirs.

The majority of water we supply is hard as it comes from the chalk but the hardness varies from source to source.

Hard water can lead to the formation of limescale in water systems and household appliances that can be avoided by using water softeners.

The quality of the drinking water we supply is very high. A comprehensive testing and monitoring programme is in place throughout the treatment and supply processes. This is all audited by the Drinking Water Inspectorate* and each year we produce a report on our water quality.

On these pages you can learn more about your drinking water including the role water can play in your health.

Looking after water in your home.*

* Southern Water is not responsible for content on external websites.