Lake Moondarra Capacity

Monday 26 June 2017 – 54.0%


Lake Julius Capacity

Monday 26 June 2017 – 90.4%

 Blue Gree Algae Level

Blue Green Algae Level - Low

Level: Medium Date Sampled: 22 May 2017

 Open Data

The Mount Isa Water Board is committed to the Queensland Government’s Open Data initiative. The Board has developed an Open Data Strategy detailing our data assessment processes and identifying data planned for release and the release schedule. The strategy reinforces our commitment to making a range of information available to the community. Learn More +


Where does our raw water come from?

Mount Isa’s raw water is supplied from either Lake Moondarra or Lake Julius. Lake Moondarra is 13 km downstream from Mount Isa and Lake Julius is more than 60km away. In normal conditions, all water is supplied from Lake Moondarra. However, when there is a drought, water is also supplied from Lake Julius.

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What are blue-green algae?

Blue-green algae are naturally occurring bacteria found in rivers, lakes, soil, tree trunks and other places. In certain weather conditions, particularly involving long periods of hot dry weather, the blue-green algae “blooms” and there is a significant increase in the blue-green algae cell population. The recent local bloom has resulted in unprecedented levels of blue-green algae in Clear Water Lagoon, Lake Moondarra and Lake Julius.

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Why don’t we top up Lake Moondarra with Lake Julius water?

The Mount Isa Water Board supplies customers from Lake Julius on an as-needed basis, and as requested by its customers. As supply from Lake Julius is significantly more expensive than from Lake Moondarra it is only supplied when necessary.

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How does the Mount Isa Water Board review water quality?

The Mount Isa Water Board has an approved drinking water quality management plan based on the Australian Drinking Water Guidelines and the risk management approach of the Water Supply (Safety and Reliability Act) (Qld).

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How much water does Mount Isa use?

In February 2015, approximately 16.9 mega litres (or 16.9 million litres) of water is being used on average each day in Mount Isa. This equates to approximately 600 litres per person per day.

This water usage is considerably higher than the same time last year. In February 2014, approximately 11.4 mega litres (or 11.4 million litres) of water was used on average in Mount Isa each day. This equates to approximately 400 litres per person per day.

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