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Our wastewater network

We have the following wastewater schemes servicing the district:

wastewater network

Our wastewater network is comprised of 341 km of pipes, 96 pump stations and 9 treatment plants. It would cost approximately $226 million to replace the wastewater assets.

Wastewater refers to used water that drains from kitchen, laundry, bathroom and other domestic sources. Water makes up 99% of wastewater, the remaining 1% consists of human waste and food scraps, heavy metals (lead, zinc, copper, debris (sand, wood, plastic), oil and grease. Businesses and industrial activities also produce wastewater which passes through the Council wastewater scheme. This will either be classed as domestic waste or trade waste.

Get more information on our Council’s wastewater network and find out about your responsibilities in relation to septic tanks and preventing stormwater from getting into Council wastewater systems.

Wastewater is transported through Council infrastructure to one of the nine Council-operated wastewater treatment plants.

 

Apply for a new connection

Connecting to the wastewater system

In Waikato, most wastewater is carried by gravity pipes. Connections to the wastewater network can be done by a drainlayer, that holds a NZ Certificate in Infrastructure Works Level 4 in the wastewater and stormwater strand. Otherwise, a qualified drainlayer with an equivalent qualification for working on wastewater or storm water assets.

If we consider the job to be complex, a maintenance contractor will be required to complete the work.
How to apply:

The drainlayer must follow this process: 

  1. Complete the work as specified in the approved plans.
  2. Email waikatoperations@water.co.nz with the pre-network connection checklist.
  3. We will review and we will send you an email. This may take up to 10 working days.
  4. When you have approval, notify us by emailing waikatoperations@water.co.nz two working days before carrying out the connection. If we have planned works or urgent unplanned works, we reserve the right to cancel or reschedule your job.
  5. Notify us again by emailing waikatoperations@water.co.nz within one working day that the job is complete.
Building over or near Council infrastructure:

If you are proposing to build within five meters of a wastewater pipeline or asset, you will need to complete and submit a build over application. Find out more here.

 

Low pressure wastewater connection

Low pressure wastewater areas in the district

Waikato District Council has four low pressure wastewater areas in Pokeno, Tauwhare Pa, Te Ohaki Road and Whānga Coast 

If you are eligible for a Boundary Kit, you can apply here for Council to complete installation. Acceptance will confirm ability, cost and location of a connection at the property boundary.  

The property owner will be responsible for all works on the private side of the property boundary, including: 

  • Installing an approved Low pressure pump station  
  • Decommissioning of an existing septic tank, if applicable 

To view costs associated with a new connection, click here for the 2021/24 Fees and Charges.   

You can apply for this connection here, this is to be accompanied by a building consent. Please note that all installations are to be completed by a qualified NZ Certificate in Infrastructure Works Level 4 drain layer as per approved engineering plans.  

The drainlayer must follow this process:  

  1. Complete the work as specified in the approved plans.
  2. Email waikatoperations@water.co.nz with the pre-network connection checklist. 
  3. We will review and we will send you an email. This may take up to 10 working days.
  4. When you have approval, notify us by emailing waikatoperations@water.co.nz two working days before carrying out the connection. If we have planned works or urgent unplanned works, we reserve the right to cancel or reschedule your job. 
  5. Notify us again by emailing waikatoperations@water.co.nz within one working day that the job is complete. 

 

Property development & wastewater

Developing land, building or renovating
If you are developing land, building or renovating, you will need to consider your wastewater needs and any consents you may need to obtain to ensure your activities are linked in appropriately with Council infrastructure and services. See land and property for more information.

 

Our wastewater schemes

The wastewater schemes are serviced by a variety of systems depending on the scale of the reticulated catchment. The smallest scheme caters for eight households averaging an inflow of about four cubic metres per day, while the largest scheme averages an inflow of about 2,300 cubic metres per day.

The treatment service is provided via pond systems, re-circulating media systems, storage tanks, pump stations and an extensive underground pipe network. Our wastewater treatment system includes:

  • Nine wastewater treatment plants.
  • 78 wastewater pump stations.
  • 292 km of reticulated wastewater pipelines.
  • 16,400 domestic and industrial property connections.
The Ngaruawahia, Huntly, Raglan and Te Kauwhata wastewater treatment plants

The Ngaruawahia, Huntly, Raglan and Te Kauwhata wastewater treatment plants have recently been upgraded.

Well-designed and implemented upgrades provide greater confidence that the quality of any water discharged continues to improve and meet environmental requirements.

These wastewater treatment plants operate using an oxidation pond system with final disposal to receiving waterways.

Huntly, Ngaruawahia and Raglan also use ultra-violet (UV) light treatment prior to discharging treated water into their receiving waterways.

The Maramarua, Matangi, Tauwhare and Te Kowhai wastewater treatment plants
The Maramarua, Matangi, Tauwhare and Te Kowhai wastewater treatment plants operate through a system of septic tanks, followed by a re-circulating media system then final disposal to land via irrigation.
The Meremere wastewater treatment plant

The Meremere wastewater treatment plant operates using an oxidation pond system with final disposal to receiving waterways.

It also uses ultra-violet (UV) light treatment prior to discharging treated water into their receiving waterways.

 

Septic tanks

Cleaning your property's tank(s)

If you're the owner of a property containing a septic tank wastewater disposal system, you must have your property's tank pumped out every three years. This is so septic tanks can continue to efficiently treat domestic wastewater from these households.

You need to get this waste material  removed by a contractor who should dispose of it at the nearest facility provided for this kind of waste product. It is your responsibility to ensure this is arranged and carried out appropriately from removal to disposal.

 

Preventing stormwater in the wastewater network

Keeping stormwater out of our wastewater systems

When stormwater enters into the Council’s wastewater network, this is called 'infiltration'. Infiltration can be caused by incorrectly-plumbed downpipes, damaged pipe work or overflows into gully traps. These overflows can pose health risks to the public; indirect environmental effects; and problems at Council pump stations.

Stormwater from your property must not enter the Council’s wastewater network. Check your property to ensure that any gully traps are high enough to prevent surface water flows entering the wastewater system. Also ensure that any roof-down pipes do not lead directly into the wastewater system or your gully trap.

Find out more about our stormwater network.

Find out more about how your actions can also impact on water supply

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