Today, a water supply system ...

Today, a water supply system consists of infrastructure that collects, treats, stores, and distributes water between water sources and consumers.This is an important topic for several reasons:

1.Water losses represent a lost opportunity. According to the latest estimates from

Environment one in every six cubic metres of water supplied by municipal water

agencies never reaches a customer. If all of this water were recovered, it could

supply all of the needs for a city of over three million people.

2.Water losses cost money. They represent over a billion dollars in potential revenue lost

annually across Canada by municipal governments.

3.Losses from water supply systems force water agencies to draw more water from lakes

and streams thereby putting more stress on aquatic ecosystems.

4.Leaks reduce the reliability of the water supply network. 

5.This may lead households and businesses to locate elsewhere, find alternative sources of potable water and otherwise

If undetected, leaks in water pipes may contribute to future pipe failures. In the city of

Toronto alone, there are roughly 1,400 water main breaks a year and the vast majority

occur in the winter—up to 70 a week (Hough, 2010).

Leaks in water pipes may allow contaminants to enter water systems thereby reducing

water quality and threatening the health of water users. 

On average approximately 13% of the water that municipal water suppliers is lost before it reaches final users. This is an important topic for several reasons: water losses cost money, losses force water agencies to draw more water from lakes and streams thereby putting more stress on aquatic ecosystems, leaks reduce system reliability, leaks may

contribute to future pipe failures, and leaks may allow contaminants to enter water systems

thereby reducing water quality and threatening the health of water users.

Some benefits of leak detection fall outside water agencies’ accounting purview (e.g. reduced health risks to households connected to public water supply systems) and, as a result, may not be considered adequately in water agency decision-making. Because of the regulatory environment.Many water utilities in Asia practice passive leakage control, meaning that they repair only those leaks that are visible. This is clearly not enough since 90% of the leaks are usually not visible on the surface. This means it takes far too long, often many years, until the utility is even aware that there is a leak. Since awareness time largely determines the volume of water lost from a pipe burst, utilities need a strategy to reduce awareness time.

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