Serving parts of North West London and the Home Counties.


Our Water Resources

 Last Update: 24 June 2019

May rainfall below average and water resources remain below average

All our regions received below average rainfall in May and groundwater sources remain below average.

As is usual for this time of year, groundwater levels start a natural decline as most rainfall is used by trees and plants for growth or is lost to evaporation.

October to March is the critical recharge period when rainfall is expected to reach the aquifers (porous rock where groundwater is stored), which is used to supply 60% of Affinity Water customers.

We have welcomed the rain that has fallen so far in June, which has reduced the demand for water. We will be providing more information on total June rainfall in the July update.

Whatever the weather, we continue to ask customers to save water. This is good for your local environment and will help you save energy, and money!

Here are a few simple things you can do to save water:

  • Take advantage of the recent downpours and install a water butt, which collects rainwater from your roof. Water stored now can be used during drier periods instead of relying on treated drinking water for your plants or even washing the car.

  • When potting up your planters use a small amount of gel crystals. They absorb water and can help retain the moisture in the soil.

  • Fix dripping taps. You could save over 5,500 litres of water a year. If you need to find an approved plumber visit

For more water saving tips, please visit


Rainfall and groundwater levels

Groundwater levels graph

*Note, this diagram represents rainfall and water levels in our central area. For groundwater levels in our east and southeast area, please click on the map below.

To learn more about where our water comes from, please visit



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


Affinity Water Regions Map Central Region East Region Southeast Region


Keep track of the tap

  • Shorten your shower – take a 4-minute shower instead of a bath – you will save around 50 litres

  • Keep track of the tap logo

  • Don’t overfill the bath – if you do fancy a bath try and use less water in it – it is easy to save over 30 litres each time

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

  • Whenever you can, use the half flush button if you have a dual flush toilet

  • A cistern displacement device 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.