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.

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Water Key Performance Indicators and Benchmarks for Offices and Hotels (2006)

This report by CIRA describes a study that has used water industry data to determine current water usage and set future benchmarks for offices and hotels. Guidance on water use reduction is also given.

For the full article click here.

Retrofitting variable flush mechanisms to existing toilets (2005)

This reports analyses a water effiiciency project trialled by the Environmental Agency and several water companies to further knowledge on the suitability of retrofit devices for demand management programmes. Two devices – Ecoflush and Variflush – were installed in domestic properties. The project used water consumption data gathered from 136 properties and feedback collected from 271 customers. In the weeks after the devices were installed, water demand fell by an average of 8.5% per property. Reductions were insignificant between the two devices, yet varied strongly between the different properties.

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Washroom behaviour and users’ perception of ‘novel’ water efficient appliances (2004)

This report investigates how human factors influence the water-saving potential of washroom appliances. As part of Thames Water’s Watercycle Project, different water-efficient devices were installed in washrooms and compared to standard appliances. Also, behaviour change measures were carried out. The results show significant behavioural differences between males and females. The two novel dual flush toilets and waterless urinals were well received by users. In contrast, the infrared controlled taps were found difficult to use and least accepted by customers. Information and labelling had a positive effect on conservation and user opinions.

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Energy Down the Drain: The Hidden Costs of California’s Water Supply (2004)

This research quantitatively evaluated the connections between energy and water in three case studies, using San Diego County’s search for future water supply options to high-light energy use in urban water systems and the Westlands Water District and the Columbia River Basin illustrate energy use in agricultural settings. Key findings include: water saving reduces energy use and bills, diverting water above dams costs power and money, water recycling is a highly energy efficient water source and Retiring agricultural land may increase energy use if the water is transferred to other agricultural or urban uses but can decrease energy use if it is diverted to the environment

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Household Greywater Reuse for Garden Irrigation in Perth (2004)

This dissertation focuses on a local system in Perth and uses a combination of experimentation and modelling to determine whether the nutrients supplied by greywater irrigation alone are sufficient to sustain the growth of a family lawn, and whether these nutrients are available for uptake by the turf. A mass balance was carried out to determine the amount of nutrients flowing into and out of the lawn. The results showed that the nutrients supplied by the greywater are beneficial to the irrigated lawn but are not sufficient to sustain its growth. Consequently, the lawn requires the addition of fertiliser to supplement growth.The dissertation examines why greywater reuse for garden irrigation is not a widespread practice in Perth. Six possible barriers were identified, the most influential of these being the cost of installing and maintaining a greywater reuse system.

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The Economics of Water Efficient Products in the Household (2003)

This study by the Environment Agency aims at estimating potential water savings from individual product groups of water-using appliances. It also looks at practical implementation issues, as well as costs accruing to domestic customers and to water companies carrying out large-scale retrofit programmes. The products reviewed include washing machines, dishwashers, toilets, showers and direct water heating appliances. The study showed, among others, that for many appliances there is no information on the relationship between price and performance. It also derives potential implications for demand management policies and programmes in England and Wales.

For the full article click here.

Sustainable Water Use in Europe: Demand Management (2001)

This is the second report from the European Environment Agency on sustainable water use in Europe and focuses on how the demand side of water management is being approached across Europe. The report is concerned mainly with measures which aim to achieve increases in the efficiency of use of water over the medium to long term.

For the full article click here.

Sharing it out: Introducing water Demand Management Strategies for Small Towns (2001)

The purpose of this report is to describe a number of practical measures that facilitate the development of effective water demand management strategies in small towns of developing countries. The report has been prepared primarily as a briefing document for organisations responsible for service provision, especially for water supply departments and municipal authorities. While it focuses on residential and institutional consumers, many of the measures described are and transferable.

For the full article click here.

Rainwater and Greywater in Buildings: Project and Case Studies (2001)

This report gives the results of research projects undertaken by CIRIA and BSRIA, collectively known as Buildings That Save Water (BTSW), involving rainwater and greywater. details the monitoring of demonstration sites, with rainwater or greywater systems, in the UK. It provides a background to the systems monitored, their operational and maintenance requirements, system reliability and user perception. Details of the monitoring results for water savings, financial analysis and microbiological data are also given.

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