Water and wastewater services for Kent, Sussex, Hampshire and the Isle of Wight
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Hampshire & the Isle of Wight

A review of the options to secure water resources for customers in Hampshire and the Isle of Wight and development of the preferred options.

Volume of additional water required:

40 million litres of water each day




Hampshire south and the Isle of Wight.

Hampshire and the Isle of Wight have historically benefited from extremely resilient water resources because of the geology of the area and the availability of water from two chalk streams, the River Itchen and the River Test. 

Under European legislation, we have agreed to introduce a ‘sustainability reduction’ on the River Itchen, which will reduce the amount of water we can abstract for public water supplies in the summer months and when flows in the river are low. Therefore, we need to secure new resources to replace these and this plan includes a set of schemes to achieve this at the earliest possible date (2018–19). These include: 

  • Upgrading Testwood Water Supply Works (WSW) to treat more water from the River Test during droughts 
  • Laying a pipeline to connect Testwood WSW to Otterbourne WSW, near Winchester 
  • Using a groundwater source near Candover to increase flows in the River Itchen 
  • A transfer of water supplies from Portsmouth Water. 

These schemes are in addition to leakage reduction and water efficiency and we are also proposing a catchment scheme to work in partnership with environmental organisations and landowners to improve the flow and biodiversity of the River Test and its surrounding areas to increase its resilience to drought. 

We have set up a steering group with representatives from the Environment Agency, Natural England, WWF, the Hampshire and Isle of Wight Wildlife Trust, Consumer Council for Water and Test Valley Borough Council to explore these schemes further as well as potential future reductions to our abstraction licences. 

Alongside these schemes, we are also investigating alternative options for large-scale water re-use and desalination. 

We will continue to consult with our customers and interested parties on all these schemes as they progress between 2015 and 2020.

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