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

ESW Water Saving Toolkit (2007)

The purpose of this report is to summarise the findings of a customer engagement trial in Chelmford, Essex, which is part of Essex and Suffolk Water’s long-term water efficiency programme. 5,000 customers were mailed an application pack in 2006-2007, which included 19 water-saving products and services. Out of 5,378 customers contacted, 1,073 households completed the audit and were fitted with water-saving products and services. Based on information from meters and data loggers, the project resulted in average savings of 13.85 litre/property/day. This equates to a total saving of 0.015 Ml/day for the project study area.

For the full article click here.

Chelmsford ecoBETA Retrofit Project (2007)

This report summarises findings from a multi-measure water efficiency trial conducted as part of Essex and Suffolk Water’s long-term water efficiency programme. Customers in Chelmsford were fitted toilet dual flush devices and received a home water audit pack to improve water-saving practices. 18.7 % of the 4,866 customers eventually took part and 1,012 devices were installed in 555 properties. 187 customers completed and returned their home water audit form. Based on information from meters and data loggers, properties saved on average 31.38 litre/property/day. This equates to a total saving of 0.017 Ml/year for the project study area.

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Garden Watering Restrictions_A Review of Hosepipe Ban Legislation (2006)

This report compiled by Waterwise seeks to clarify the aims of introducing a hosepipe ban, and suggests amendments to the legislation that would make restrictions relevant to today’s society and so be more effective in achieving the aims of a ban. The review briefly discusses the current water situation in the UK, looming changes to water supply, and factors that have led eight water companies imposing hosepipe bans by mid summer 2006. The shortcomings of the current legislation are assessed and finally amendments that could assist in creating a consistent approach to implementing restrictions during times of water shortages are proposed.

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Every Drop Counts: Achieving Greater Water Efficiency (2006)

This 2006 IPPR paper proposes ways to achieve high levels of water efficiency by government policy and legislation. It discusses the need for more water efficient homes and sets targets for future water efficiency.

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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.

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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.
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