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 efficiency in the south east of England retrofitting existing homes (2007)

This study commissioned by the Environment Agency explores effective ways of increasing water efficiency in existing homes in South East England, building on findings of an earlier study. Following a pre-selection process, five demand management measures were analysed in-depth. Results indicate that average incremental social costs of retrofitting water efficiency measures compare favourably with the costs of traditional resource development schemes. The highest water savings would spring from a combination of different measures. The study also highlights that water savings increase significantly with only a small increase in cost if full subsidies and free installation are provided as part of the ‘package’.

For the full article click here.

South West Water Explicata WET Report 1 (2007)

This report by South West Water analyses a water efficiency trial for households. The study comprised ‘Control’ and ‘Sample’ households, 109 and 430 respectively, which were offered a variety of water-saving devices for installation. The analyses prior and after device installation indicate percentage water use reductions of approximately 10% per household, which declined to 6% after seven months following the installation. The water- saving device percentage reduction was greater the larger the number of devices installed in the household.

For the full article click here.

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.

For the full article click here.

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.

For the full article click here.

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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