Data Logging and Leak Detection

Our data logging and leak detection service has been helping large non-residential customers save water through improved visibility of water use.

A data logger is a small device that is fitted to your water meter and measures water use throughout the day.

Customers can access water use data via a website to identify any unexplained water losses such as leaks, faulty equipment or excessive irrigation.

  • Data loggers show you how water is used at your property.
  • The data logger will be installed free of charge for up to six months.
  • They identify issues such as leaking pipes, broken fixtures and incorrectly set irrigation systems, which have the potential to waste millions of litres of water a year and are relatively cheap to resolve.
  • Financial savings due to reduced volumetric water and sewerage charges.
  • Improved environmental performance by using less water to deliver the same products and services.
  • The ability to demonstrate your commitment to corporate social responsibility and promote your environmental credentials.

Data loggers are available to any non-residential customer that consumes more than 5,000 kilolitres of scheme water per annum, or, if you suspect you have a large water loss and would like some assistance. Please use the application form to register your interest.

Data loggers show water usage and volume. Baseflow is the amount of water use that cannot be explained by a known process or activity and is often measured in litres per minute or litres per hour. Baseflow should always be investigated to help you understand where your water is going.

In some cases like a manufacturing plant, which operates non-stop without regular shutdown periods, baseflow might not indicate a leak. In these cases, data loggers can still identify issues when shutdowns for maintenance occur.

For most businesses, continuous water use overnight, particularly in the early hours of the morning represents an opportunity for investigation. Even in businesses like hotels that have people on site 24 hours a day, the water use should still return close to zero during this time. By installing isolation valves into your plumbing network, you can isolate various areas of your site by turning water off to a specific area.

If the baseflow visible on the data logger then disappears or is reduced, it indicates that this is the area you should investigate further. Not only does this save time for your plumber but you'll save money too.

A customer was alerted to unusual use levels via a data logger. This prompted an investigation that identified a leak which was responsible for around 33% of the property’s water use.

 Initial usage report from a data logger which identified unusual activity


Wet grout on the pavement identifies a possible leak area

After being alerted to a possible problem, staff noticed wet grout on the pavement (this was previously not identified due to regular cleaning).

First pavers lifted in the search for a possible leaking pipe

Lifting the pavement exposed very wet ground, despite the area being dry for a number of days.

A leaking pipe is exposed under the paving

After turning off the water, staff dug down to expose a leaking pipe.

With the water turned back on, the hole filled up very quickly

After turning the water back on, the hole filled up very quickly.


The hole in the pipe that was causing the leak, alongside a ruler which measures it at approximately 25mm

A small hole created a leak that if left unresolved would have wasted around eight million litres of water a year and cost the customer around $34,000 annually.

Graph showing the average daily water use drop by a third after the leak was repaired

The site saw their average daily water use drop by a third after the leak was repaired.

More information

To find out more about this service please email us.

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