Improving water efficiency in UCL buildings

UCL is reducing the amount of water consumed during the construction and operation of its buildings.

Between 250 and 300 buildings are operated by UCL across its campuses, and the university is undertaking an ongoing programme of construction and refurbishment to improve its estate. 

“This provides the opportunity to consider how we can reduce water consumption, both during the building work and in their future operation,” says Ben Stubbs (Sustainable UCL).   

All building projects that have an impact on water use implement measures to monitor and reduce potable water consumption during both construction and operational phases. 

UCL’s standard target for new buildings is a 40% reduction in water consumption compared to the standard industry baseline, as defined by BREEAM, the environmental assessment method for buildings. 

To achieve this, the university identifies the potential for water efficiency improvements in all projects that involve the provision, upgrade or replacement of facilities or fittings using the mains water supply.  

New developments typically achieve this through specifying efficient sanitary fittings, as well as monitoring ongoing water usage. For example, the UCL Student Centre uses low-flush toilets and water-efficient shower facilities, contributing to a projected 55% reduction in water consumption.  

Where practical, UCL’s buildings also reduce the potable water supply with rainwater harvesting and greywater recycling. 

Contractors are also expected to set water consumption targets during construction or refurbishment projects and then to monitor and report on the results. 

“We also require all building projects to demonstrate how they have minimised any potential water pollution or flooding through the use of sustainable drainage measures,” explains Ben.  

“The new Student Centre is among UCL buildings with a green roof and the new Astor College student residence has a blue roof. These both regulate rainwater runoff from the site, reducing the impact on local drainage systems.”