Water Efficiency Database

Welcome to our resources search page. Please use the drop down menu to find recent Waterwise research and reports. This website also hosts the Water Efficiency Evidence Database, which is a repository of key research reports and paid for by UK water companies to support research and innovation.


Search Resources

Quantifying the Energy and Carbon Effects of Water Saving (2009)

This report by the Environment Agency and Saving Energy Trust seeks to determine the CO2 emissions resulting from specific water using activities and behaviours in the home. Building on a 2008 study, it calculates the CO2 quantities generated at different stages of the water supply-use-treatment process. It also estimates which household appliances produce how much CO2 emissions, considering hot and cold water use, different energy sources, and use scenarios between existing and new houses. Additionally, the study provides numbers about financial costs of CO2 savings from various measures has been quantified.

For the full article click here.

Public Understanding of Sustainable Water Use in the Home (2009)

This report commissioned by Defra explores the public’s aspirations, assumptions and expectations around sustainable water use in the home. 18 focus groups and 70 follow-up semi-structured telephone interviews were conducted. The study highlights customer's limited awareness of water scarcity and the environmental implications of water usage. While there is some awareness of basic water efficient behaviours, participants reported few motivations to save water – particularly for those without water meters. Campaigns are recommended to not only raise awareness of water efficiency, but inform people about the reasons why it matters (e.g. environmental impacts) and how their individual contribution can make an impact at large.

For the full article click here.

Water Efficiency Calculator for New Dwellings (2009)

This document sets out the water calculation methodology for assessing the whole house potable water consumption in new dwellings. The calculation method is to be used to assess compliance against the water performance targets in Building Regulations 17.K and the Code for Sustainable Homes.

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Efficacy of Water Efficiency Retrofitting (2009)

This reports evaluates the data from a home audit trial carried out for United Utilities in 2006-2007 to better understand the efficacy of water efficiency retrofitting. 4,642 domestic properties in Warrington were sent an invitation. 393 households took part in the audit and received a ‘water savers pack’, which included a basic shower timer and information on saving water. The data analysis showed that household dynamics, socio-demographic factors and the type of house account for 50% of overall household consumption and 41% on the per capita consumption. The installed devices reduced consumption, with low-flow showerheads being most impactful.

For the full article click here.

Water Efficiency Retrofitting: A Best Practice Guide (2009)

This is an update of the best practice guide “Water Efficiency Audit Programmes” published by Waterwise in 2008. It will summarise current best practice for water efficiency retrofitting, for those wishing to carry out large-scale projects and for companies wishing to carry out water efficiency trials to contribute to the evidence base. Drawing on experience by practitioners, it will suggest ways in which trials can contribute to existing knowledge gaps, with a particular focus on the planning phase. It seeks to reinforce the connection between company-led water efficiency retrofitting projects and the need to build an evidence base to support large-scale water efficiency.

For the full article click here.

Comparing Measured Consumption with Modelled Consumption Using the Code for Sustainable Homes (2009)

This investigation was undertaken by Portsmouth Water to assess how water-efficient fittings can reduce water demand in new homes. However, no water-saving devices were installed by the developer as planned, which is why only water consumption patterns were assessed. The sample of 60 homes with a mean occupancy of 2.17 people consumed on average 125.9 litres/household/day. Consumption was lower in the shared than in private ownership properties, despite having very similar water fittings. A 6/4 L dual flush toilet was seen to be relatively ineffective at driving down demand compared to a 6 L single flush option.

For the full article click here.

H2eco Phase III (2009)

This report aims at evaluating the project H2eco by Essex & Suffolk Water. It is the third in this series of water efficiency studies focusing on the installation of water-saving devices within domestic properties of Chelmsford, central Essex. Out 2492 predominantly metered customers (82.9%), 252 received applications and 194 completed an audit. The trail achieved water savings of 33.08 litres/property/day.

For the full article click here.

Water Efficiency Trial Report (2009)

This report outlines a water efficiency trial that Wessex Water undertook together with Somer Community Housing Trust, the Environment Agency and Resource Futures. The trial involved assessing the uptake, effectiveness and costs of different water efficiency activities in 24 blocks of social housing flats in Bath. Blocks were split into four groups, each receiving different educational and technical water-saving measures. Uptake rates amounted to 45% for dual flush devices and 50% for engagement activities. Where interventions took place, up to 14% less water was used. The device interventions appear to be more effective than educational engagement.

For the full article click here.

Intelligent Metering for Water Potential Alignment with Energy Smart Metering (2008)

This report examines the potential for aligning intelligent water metering systems with energy smart metering. With large-scale rollout of energy smart metering anticipated by the Government and the energy industry, this report describes the smart metering developments in energy and explores the political environment. Opportunities were investigated for a jointly developed, universal, coordinated installation and rollout of energy and water smart metering solutions. The report concludes that while a joint rollout may not occur in the near future, it is important to avoid creating any barriers to do so long-term.

For the full article click here.

Waterwise Manifesto European Elections (2008)

In this document Waterwise calls for greater attention to the significant potential of water efficiency measures in mitigating and adapting to climate change and boosting the economy. Recommendations include making water saving pay and developing the European new Green Water Deal

For the full article click here.
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