Water resources

Find out about the current status of our water resources, including groundwater, reservoir and rainfall levels.

Latest water resources update

Updated October 2023


The Wessex region received 161 mm of rainfall in October which is well above the monthly average. Overall, the rain received in the last six months (May to October) has been 131% of the long-term average.


Our surface reservoirs have quickly refilled due to the recent period of heavy rainfall and levels are well above average for the time of year. At the end of October, storage was at 98% of total capacity.


Groundwater levels at all monitoring sites have risen rapidly throughout October and all were above average by the end of October.

Rivers and streams:

River flows are monitored on a daily basis to ensure stream supports are switched on as the appropriate flow triggers are reached. Stream supports are helping to improve river flows at the following locations (as of 06/11/2023):

  • Chitterne (1.5 Ml/d into Chitterne Brook, nr Warminster)
  • Watergates (6.5 Ml/d into Tadnoll Brook, Dorset)

Using water wisely

We are committed to helping customers to reduce their water use. We offer free water efficiency devices to our customers and also provide useful tips on how to reduce water use both in in the home and garden. Using water wisely can reduce customers' utility bills and help their local environment.

Explore our water saving tips

Types of water sources

Around 97% of the water on Earth is salt water and the remaining 3% is freshwater. These are our main freshwater sources:


Rainwater is a relatively clean water source, but it can become contaminated once it hits the ground, which is why we treat it before supplying it to customers. Rainwater harvesting also plays an important role in reducing pressure on the water network.


Reservoirs are constructed lakes or bodies of water designed to store rainwater before it is transported to water treatment centres. Once cleaned, this water is then supplied to homes and businesses.


Groundwater can be found beneath the Earth’s surface in the cracks and spaces between soil, sand and rock. We use boreholes, which have been sunk up to 120 meters underground, to pump this water to the surface.

Rivers and streams:

Rivers and streams provide many benefits to humans and are important habitats for plants and animals. They also carry water, organisms, gases and nutrients to areas that need them, as well as draining nearly 75% of the Earth's land surface.

Regional water resources

There is a new requirement for water companies to work together to produce regional water resource plans and, where possible, assess the potential to move water from areas of excess to areas of deficit.

More information on the group can be found at our dedicated West Country Water Resources website.

We are working together to produce our first Regional Water Resources Plan which will be published this year.

In addition to producing a regional plan, regulators require us to investigate the feasibility of three potential regional schemes over the next five year period.