In Cambridge our water supply comes from underground, under the Gog Magog hills. The same aquifer feeds streams that feed into the River Cam. When the level of water in the aquifer is low, the streams are reduced to a trickle and in summer 2019 some of them dried up completely; this was catastrophic for the animals and fish in the water, plants on the banks, and for birds, insects and other life that feeds on them. Also, low flow in the rivers and streams increases the effect of pollution. To find out more, read the Transition Cambridge pages on water.
The less water we use the better for the environment. How much do you use? Use this tool to estimate your use and see how how you compare with other households in Cambridge. Then see how much you could save, for example by taking shorter showers or installing a dual flush toilet.
Your total: XX litres/person/day* Assumptions behind these calculations
Measuring in litres/person/day:
140 - National average (see Discover Water for more information)
110 - New developments in Cambridge, as estimated by the water calculator, part G of building regulations. (Due to water shortages in the region, Cambridge City Council has included these water efficiency requirements for new developments in the Local Plan (adopted in 2018.)
80 - Code for Sustainable Homes level 5 or better - Eddington was built to this standard. It uses rainwater harvesting to achieve this. Rainwater can supply toilets and washing machines but should not be used for drinking or personal hygene.
*Please note this is only an estimate. If you have a water meter you can check how much you use on your bill. These are usually twice a year and report in cubic metres. Your use is XX cubic metres in six months.