How can you evaluate a building's water efficiency?

1 Water balance

A water balance is a simple way to measure the difference between the water inputs and outputs of a building. It considers the sources of water supply, such as municipal, rainwater, or recycled water, and the uses of water, such as domestic, irrigation, or cooling. By calculating the water balance, you can determine the net water consumption of a building, and compare it with benchmarks or standards. A water balance can also help you identify potential water savings or reuse opportunities.

2 Water audit

A water audit is a more detailed and comprehensive analysis of the water use and performance of a building. It involves collecting and reviewing data on the water consumption, distribution, and quality of a building, and identifying the major water users and wastage points. A water audit can also include inspections, measurements, and tests of the water fixtures, fittings, and equipment, to evaluate their efficiency and condition. A water audit can help you diagnose the problems and causes of water inefficiency, and recommend solutions and actions.

3 Water rating

A water rating is a way to compare and communicate the water efficiency of a building, based on a standardized criteria or system. It can be a label, a score, or a certification, that reflects the water performance of a building in relation to its peers or targets. A water rating can be used to demonstrate compliance, recognition, or marketability of a building, and to motivate improvement or innovation. Some examples of water rating systems are the Water Efficiency Rating Scheme (WERS), the Water Efficiency Labelling and Standards (WELS), and the LEED Water Efficiency credit.

4 Water modeling

A water modeling is a way to simulate and predict the water behavior and performance of a building, using mathematical or computer-based tools. It can be used to analyze the water demand, supply, and quality of a building, under different scenarios and conditions. A water modeling can also be used to test and compare the effects of different water efficiency strategies, such as rainwater harvesting, greywater recycling, or low-flow fixtures. A water modeling can help you optimize the design and operation of a building, and evaluate its environmental and economic impacts.

5 Water monitoring

A water monitoring is a way to track and measure the water use and performance of a building, using sensors, meters, or indicators. It can be used to collect and record real-time or historical data on the water consumption, distribution, and quality of a building, and to generate reports or alerts. A water monitoring can also be used to verify and validate the results of water audits, ratings, or models, and to identify deviations or anomalies. A water monitoring can help you control and manage the water efficiency of a building, and to adjust or improve it as needed.

6 Water feedback

A water feedback is a way to inform and engage the occupants and users of a building, about the water use and performance of a building, using visual or auditory cues. It can be used to educate and raise awareness of the water issues and impacts of a building, and to encourage behavior change or participation. A water feedback can also be used to reward or incentivize the water efficiency achievements or actions of a building, and to create a sense of ownership or responsibility. A water feedback can help you foster a water-saving culture and community, and to enhance the satisfaction and well-being of a building.

7 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?