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Water supply and treatment

We are committed to the ongoing management, maintenance and improvement of the drinking water supply catchments and providing high quality water to Tauranga residents.

The water that Council supplies to your home comes from two spring-fed streams, the Tautau and the Waiorohi. The water is treated with microfiltration technology at two water processing plants, Oropi and Joyce Road.

Tauranga City uses an average of 36 million litres of water per day.  In summer this can rise to 54 million litres per day. To help keep up with the demands of a growing city, a third microfiltration water processing plant is planned to be built along the Waiari Stream in Te Puke.

Microfiltration

Tauranga City's drinking water is treated using microfilters that trap and extract dirt and tiny micro-organisms like giardia and cryptosporidium. The microfiltration process uses millions of tiny straws that are less than 1mm across.  

The raw water enters the tubes and passes from the outside to the inside of the straws through tiny holes.  The clean water passes out through the core of the straws and is chlorinated before being put in the treated water reservoir. Treating water this way means the amount of chemical needed to treat the water is minimised. 

Chlorine is added at the end of the treatment process to maintain the quality of the water on its journey across the city to homes and businesses. The dose of chlorine that is required is very small, 1 litre of chlorine per million litres of water.

Joyce Road water processing plant

The original Joyce Road plant was opened in 1958 and was replaced in November 1997. It was built to serve the Mount Maunganui Borough. The new Joyce Road treatment plant was the first in New Zealand to use microfiltration technology for public water supply. Supplied by water from the Tautau Stream, the plant can produce up to 37,000 cubic metres of water a day. This is enough to supply the whole of Tauranga city during the winter when demand is lower.  

Oropi water processing plant

The Oropi water processing plant was opened in 1957 and was upgraded in 1997 to microfiltration technology. From 1910 to 1957 water was taken from the Waiorohi Stream, chlorinated and then gravity-fed down to the town. Rebuilding the treatment plant at the same site enabled the intake and other structures to be retained. The Oropi Plant can produce up to 33,000 cubic metres a day.  

Waiari water processing plant

Construction of the new processing plant along the Waiari Stream is expected to start in 2018 and be completed around 2021. The project was successfully deferred for at least 10 years thanks to the introduction of water meters in 2000, but summer demands are now starting to push Oropi and Joyce Road to their limits as the city grows. 

Waiari Water processing plant

Water Treatment Quality policy

Water Treatment Staff and Management are committed to:

  • Creating a work environment that is both productive and enjoyable, whilst achieving measurable quality results.
  • Complying with relevant legislation, consents and regulations to provide water quality that meets the drinking water standards and Council’s level of service.
  • Using the best practical processes to ensure continued quality of water is provided and identifying opportunities for improvement.
  • Being responsive to customers and stakeholders, while continually providing a consistent, friendly and professional service. 

We shall provide a framework that:

  • Regularly reviews objectives with the view of improving the effectiveness of the quality management system.
  • Enables staff to take ownership of the day to day work practices in a safe working environment.
  • Considers quality, environmental impact and sustainability of our work alongside the operational and financial aspects.
  • Educates and informs staff and the public of water quality issues, and enlists their support in improving performance and sustainability.
  • Manages change and embraces opportunities for continual improvement.

Last Reviewed: 13/02/2018
 
 

 
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Tauranga City Council, Private Bag 12022, Tauranga, 3143, New Zealand   |  Terms of use   |  Site map

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