Water conservation strategies for Sustainable Construction

With water scarcity a growing challenge in South Africa, cultivating smart water habits in construction has become crucial – especially as climate change intensifies the pressure on our resources.

Water has long been accessible for our use, yet it’s been widely mistaken as an abundant resource. Water scarcity is a growing concern, increasingly affecting our everyday routines and habits. Water utilities face mounting pressure owing to diverse climatic conditions such as droughts and flooding events. In addition, the South African Department of Water and Sanitation’s No Drop report has also indicated that water losses account for 40.8%, or 1.79 million m³. Much of our water is lost through preventable issues, such as burst pipes, overflowing reservoirs, leaking connections and inadequate or non-existent metering. Such factors underscore the vital importance of implementing water conservation strategies to encourage water efficiency – particularly in the construction sector, which is a water-intensive industry.

Water conservation in the construction sector

According to data analytics and consulting company Global Data, the South African construction market is expected to increase at an average annual rate of more than 3% from 2024 to 2027. This increase is attributed to investments in transportation, energy, industrial and housing developments. Such expansion directly impacts water consumption in construction, which has a significant water footprint in activities such as site preparation, concrete mixing and equipment cooling, and post-construction tasks spanning plumbing to landscaping. As construction projects grow, so does the need for water, emphasising the importance of sustainable water management strategies in the sector.

Smart tips for water-wise construction practices:

Use alternative water sources: To alleviate the pressure on potable water, construction sites can utilise rainwater, greywater and reclaimed water for non-potable purposes such as equipment washing and dust suppression.
Adopt efficient technologies: Without sacrificing on quality, water consumption can be decreased by incorporating a closed-loop water-recycling system. High-pressure, low-volume washers and water-efficient concrete-mixing technologies (such as hydraulic cement mixers) can also be incorporated into operations.
Design and plan for water efficiency: Water-efficient building design is a fundamental component of sustainable construction. Include water-saving elements in building plans, such as rain gardens, water-retention systems (which reduce run-off), and permeable pavements (which recharge groundwater). In addition to conserving water, these approaches manage stormwater efficiently.
Plan landscaping wisely: Post-construction landscaping should include hydrozoning, where plants are irrigated according to their specific water needs, thus reducing water waste. Installing drip irrigation also ensures efficient water use.
Monitor and manage leaks: A leaking tap dripping once per second can waste over 11 000 litres (approximately 73 full bathtubs) of water annually. Thus, regular maintenance and inspections of plumbing, fixtures and irrigation systems are essential to prevent water waste.
Educate and train workers: Empower contract workers on the team with water-conservation practices through awareness campaigns, and promote an accountable culture. Simple practices, such as turning off the water while not in use, can result in large financial savings.

Embracing water conservation during construction is more than just a responsible choice – it’s a strategic one. Reduced water usage lowers project costs, minimises delays caused by water shortages, and aligns with global calls for sustainable development. Be #WaterWise