The Smart City Approach to Sustainable Water Management

While there’s no single definition of a smart city, it’s broadly understood as a city using information and communication technologies (ICTs) to enhance quality of life, improve efficiency across areas like security and transport, and address economic, social, and environmental needs, both now and into the future.

A large portion of this pertains to water and sanitation; access to water and sanitation is recognised by the United Nations as a human right - fundamental to everyone’s health, dignity, and prosperity.

With global populations continuing to rise, ensuring reliable and clean water access has long been an issue for many countries, both developed and developing.

Water management is intrinsically linked to the concept of a smart city, utilising hardware such as IoT devices and sensors to enable analytical insights and real-time data sharing, allowing for more planned and proactive water management. Beyond purely technological advancement, smart water systems also support broader socioeconomic development by enabling cities to better understand their infrastructure, identify inefficiencies, and allocate resources more effectively.

Using IoT and connected solutions, water utilities can reap benefits such as improved leak detection and maintenance, operational improvements grounded in advanced analytics, easier regulatory compliance, enhanced visibility into environmental impacts, and water usage savings through the incorporation of weather data into forecasting and allocation models (AVEVA, 2025). Smart monitoring systems further allow for continuous, low-energy network oversight, detecting changes in flow, pressure, and water quality without requiring constant manual intervention.

Traditional water management systems often suffer from data fragmentation, leading to inaccurate outputs and service interruptions due to a lack of preventative capabilities, as well as a reliance on manual processes and reactive maintenance. In many cases, this results in degraded infrastructure, irregular supply, and discrepancies between actual consumption and billing.

While smart water infrastructure may be costly upfront, ensuring efficient water monitoring and supply is a cost-effective solution in the long term. The implementation of smart metering and advanced monitoring infrastructure enables more accurate consumption tracking, improved demand forecasting, and the identification of inefficiencies such as leaks or illegal connections.

Smart water management leads to reduced leakage and water loss, improved asset lifecycles, reduced energy usage, and better conservation (Sand Technologies). It also enables the creation of comprehensive data ecosystems, allowing utilities to build detailed system-wide databases that support better planning, optimisation, and service delivery. In some cases, improved visibility into consumption has enabled users to reduce water usage significantly, reinforcing both economic and environmental benefits.

In countries like South Africa, where many major cities face ongoing water challenges, efficient and smart water management becomes a necessity rather than a pipe dream, with the majority of smart city initiatives already focusing on improving water and energy management, as highlighted by SAP in Building South Africa’s Smart Cities (2024).

The continued development of AI and digital twins offers further benefits to efficient water management, supporting sustainability initiatives in terms of energy and water conservation, among other areas. These technologies enable simulation and optimisation of water systems, improving decision-making and allowing cities to model real-world scenarios such as demand fluctuations. Digital twins also contribute to increased urban resilience, such as improved flood management, which in turn feeds back into optimised water management.

While challenges remain, ranging from implementation costs to digital literacy, accessibility, and transparency, these innovations provide clear benefits for city officials, citizens, and overall water resource security.

Ultimately, the success of smart water management will depend on how effectively cities integrate these technologies into existing infrastructure and governance frameworks. As urban populations grow and water pressures intensify, the ability to move from reactive systems to intelligent, data-driven management will not only define smart cities, but determine their long-term sustainability.