Reducing Non-Revenue Water: The Role of Satellite Leak Detection | A Ramboll Whitepaper, by Marion Liemberger

Non-Revenue Water (NRW)—the gap between what is produced and what is billed—remains
one of the most pressing challenges for water utilities worldwide. Globally, up to 30% of all
treated water is lost through leaks, theft, or metering inaccuracies. In regions with aging
infrastructure or poorly monitored networks, these losses can soar even higher. Each litre lost
carries a hidden price tag, representing wasted energy, chemicals, and financial resources,
while intensifying environmental pressures.

The stakes extend beyond financial concerns. High NRW levels can compromise water quality,
with leaks allowing contaminants to infiltrate the system, jeopardising public health and
eroding trust in utilities. For utilities already under strain, the question isn’t whether to act but
how to act most effectively.

Effective NRW management starts with leak detection—a field that has evolved significantly
over the years. Traditional tools like acoustic sensors and pressure monitoring remain valuable
but are now complemented by advanced innovations such as Satellite Leak Detection (SLD).
SLD, in particular, offers unique advantages: scanning vast networks quickly, detecting hidden
leaks, and enabling utilities to optimise resource allocation. However, no single tool is a silver
bullet. Success depends on a comprehensive strategy that integrates multiple technologies,
robust Geographic Information Systems (GIS), and skilled boots-on-the-ground (BOTG) teams.

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