Serving parts of North West London and the Home Counties.


Our Water Resources

Wet weather helps groundwater continue recovery

 Last Update: 17 May 2018


Current levels: Near normal

We welcomed the rain in April and March, which was significantly above the long term average following the below average rainfall of the last two winters.

October to March is the critical recharge period when rainfall is expected to reach the aquifers (porous rock where groundwater is stored), which are used for 60% of supplies so our resources had still been low by the end of February.

The above March and April rain means we are pleased to report a significant recovery in our groundwater sources and we are now approaching ‘near normal’ groundwater levels so it is unlikely that restrictions will now be needed this year.

As we head into the summer period, most rainfall is used up by trees and plants for growth or is lost to evaporation, which makes any further recovery in groundwater levels unlikely until the start of the next recharge period in autumn.

Demand for water also affects groundwater levels and we may see groundwater levels reduce if demand is higher than usual over the summer period.

Water will remain a scarce resource in the South East of England as we continue to meet the high demand for water from customers, whilst meeting our commitment to leave more water in sensitive habitats and local rivers.

It is therefore imperative that we all do more to save water – this will reduce the risk of needing restrictions in the future. Every little step we can all make collectively has a massive impact on reducing demand for water.


Rainfall and groundwater levels

Groundwater levels Infographic


How can you help

On average, we use over 150 litres per person per day. Half of what we use is bathing, showering, and flushing the toilet. Here are a few tips to save water.

  • Shorten your shower – take a 4-minute shower, you’ll save around 50 litres (even cutting your shower time by 1 minute can save up to 15 litres)

  • Running your bath just an inch shorter than usual can save an average of 5 litres.

  • Turn off the tap while brushing your teeth, and save over 6,500 litres of water a year and encourage others to do the same

  • If you have a dual flush toilet, use the small button on your toilet for liquids)

  • A save a flush device in your toilet can save one litre per flush, saving up to 5,000 litres a year.

We have more useful tips to save water and free water saving devices here >>


What we're doing

  • We are focused on fixing leaks, and achieved the highest leakage reduction target in the water industry. If you spot a leak you can report it here>>

  • We are investing in our network by replacing water mains to reduce the number of bursts and leaks.

  • Working in partnership with other water companies and the Environment Agency

  • We are continuing our water saving campaign for customers, ‘Keep track of the tap’ campaign to raise awareness and help people save water.



Learn more about the groundwater levels where you are

Click on the map below to see what the water levels are like where you live


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