Kerepēhi Raw Water Upgrades

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Kerepēhi has been busy over the last 12 months with construction of two new raw water storage reservoirs at the water treatment plant. Work continues on the replacement of the existing main from the Pekapeka intake on Hauraki Road.

Raw Water Storage Reservoirs

With construction now complete, the new reservoirs will add around 4 million litres of additional storage. This will significantly reduce the risk of a raw water shortage that can occur in severe weather events and due to the tidal influence of the source water (Waihou river).

At its previous processing throughput, the water treatment plant had about 24-hours of raw water reserves. Now the network can be continuously supplied which increases the resilience of the water supply without loss of service.

The budget for this project was approximately $2.7 million. Construction was carried out by Reliant Solutions Limited, who also constructed the two treated water storage reservoirs at the site in 2018. The two new tanks were constructed simultaneously at the back of the treatment plant.

Feel free to take a look at the timelapse video on the right side of the page. This shows the construction process from the ground preparations to the finished tanks.

Raw Water Main

The 5.3km-long water pipe that supplies raw water had come to the end of its life. It’s now been replaced with a new pipe that’s 630mm wide.

To finish the job, the new pipe needs to be connected to the two storage tanks. This will mean swapping out an older, smaller pipe (450mm wide) that carries water from the Pekapeka intake to the Kerepēhi water treatment plant. Plans are in progress to choose the best time to switch everything over with as little disruption as possible.

The budget for the pipeline is $6.05 million.

Above: The red and blue line is the water main which has been replaced

We will be posting regular updates throughout the Kerepēhi Raw Water upgrades right here.

You can also keep up with the latest news throughout the Hauraki District by signing up for our newsletters.

Kerepēhi has been busy over the last 12 months with construction of two new raw water storage reservoirs at the water treatment plant. Work continues on the replacement of the existing main from the Pekapeka intake on Hauraki Road.

Raw Water Storage Reservoirs

With construction now complete, the new reservoirs will add around 4 million litres of additional storage. This will significantly reduce the risk of a raw water shortage that can occur in severe weather events and due to the tidal influence of the source water (Waihou river).

At its previous processing throughput, the water treatment plant had about 24-hours of raw water reserves. Now the network can be continuously supplied which increases the resilience of the water supply without loss of service.

The budget for this project was approximately $2.7 million. Construction was carried out by Reliant Solutions Limited, who also constructed the two treated water storage reservoirs at the site in 2018. The two new tanks were constructed simultaneously at the back of the treatment plant.

Feel free to take a look at the timelapse video on the right side of the page. This shows the construction process from the ground preparations to the finished tanks.

Raw Water Main

The 5.3km-long water pipe that supplies raw water had come to the end of its life. It’s now been replaced with a new pipe that’s 630mm wide.

To finish the job, the new pipe needs to be connected to the two storage tanks. This will mean swapping out an older, smaller pipe (450mm wide) that carries water from the Pekapeka intake to the Kerepēhi water treatment plant. Plans are in progress to choose the best time to switch everything over with as little disruption as possible.

The budget for the pipeline is $6.05 million.

Above: The red and blue line is the water main which has been replaced

We will be posting regular updates throughout the Kerepēhi Raw Water upgrades right here.

You can also keep up with the latest news throughout the Hauraki District by signing up for our newsletters.

Page last updated: 10 Sep 2025, 02:27 PM