Drinking water: Self-supplying schools

Information, advice and resources to support self-supplying school in supplying clean safe water for staff and students.

Level of compliance Main audience Other


  • Boards
  • Principals and Tumuaki
  • Administrators

There are currently around 500 self-supplying schools in New Zealand. Self-supplying schools should comply with Section 10 of the Drinking-water Standards for New Zealand 2005(external link) which are available on the Ministry of Health's website. Additional compliance is detailed below including registering with the ESR. 

Legislation and standards

Health and Safety at Work Act

Providing clean water at your school is part of your overall health and safety responsibilities. We recommend you review your school’s health and safety systems.

This will help you meet the requirements of the Health and Safety at Work Act 2015.(external link)

Drinking Water standards

We recommend self-supplying schools comply with Section 10 of the Drinking Water Standards which are available on the Ministry of Health's website.

Under Section 10, you must have a Water Safety Plan.

Small Drinking-water Supplies(external link)

You must also:

  • have appropriate treatment based on the risk to the supply
  • monitor the water quality with regular testing, either monthly if you have an older treatment system or every three months if you have a newer treatment system.

When your water supply or water quality is compromised you must contact your school's property advisor and the Ministry of Health's public health unit.

School property advisors

Public health unit contacts(external link)

How to keep the water supply safe 

You must register with ESR

Self-supplying schools must be on the Drinking-water Register for New Zealand(external link).

Being registered means your school has a unique zone code, which you use on all sample bottles and documentation.

Your public health unit contact at the Ministry of Health can advise you on how to register and also check your details are correct.

Keep your roof water safe

Collecting water from a roof could result in contaminants (for example, from birds and animals), and corrosion materials, including lead from flaking paint or old nail heads, in your water supply.

To mitigate these risks make sure your roof is maintained to a good standard, including:

  • cutting back trees from your roof
  • making sure your roof and guttering is clean
  • using lead-free materials
  • keeping your roof in good repair. 

Run drinking taps before school starts

Some heavy metals get into water through metal pipes corroding. It builds up when water sits in the pipes overnight.

Make sure all drinking taps are run briefly before the start of school. This is usually done by your caretaker. 

Test water

All state schools are annually asked by the Ministry's agent Argest where they obtain their water from (town supply, self-supply, or other supply).

Depending on your supply, you may have to have your water tested.

If your school is required to have its water supply tested you must record the results with Argest's secure online service.

If your school is required to test its water supply, but you haven't yet recorded the results online, contact Argest for a password.

Email: TeamMOE@argest.com

Phone: 0800 274 378

Train staff 

You shouldn’t need to employ anyone to manage your water treatment.

Staff can be trained in all aspects of water treatment, including:

  • writing your Water Supply Plan
  • identifying required maintenance on your water supply
  • testing the water
  • making sure your water meets the Standards.

Your Ministry of Health public health unit contact can help.

Treat water

Visit the Ministry of Health website to find out about the different ways to make water safe.

Treatment options for small drinking-water supplies(external link)

You may need to install backflow preventers.

Backflow prevention

Support from the Ministry of Health

Ministry of Health website

A Framework on How to Prepare and Develop Water Safety Plans for Drinking-water Supplies(external link)

Drinking water DVD series(external link)

Drinking-water resources(external link)

Public health units

You can talk to your public health unit about:

  • technical advice
  • drinking-water safety
  • water safety planning
  • getting the most out of your treatment system
  • schemes or suppliers that may help you to manage your water
  • options for upgrading your treatment system.

Always get independent advice before maintaining or upgrading your equipment, or employing consultants. 

Amount of drinking water to provide

For normal daily use, you must be able to provide at least 23 litres of water per person per day.

You should consider the storage of drinking water in the event of an emergency. For guidance on good practice for water storage and on the amount of water you should store, refer to the Get Thru website.

Storing water(external link)

Budgeting for your water supply 

Include water management in your 10 Year Property Plan.

Make sure you budget for water infrastructures like backflow preventers, taps and pipes.

Compromised water and system breakdowns

If water becomes unsafe to drink, you must stop people from drinking it. For example, put up notices saying 'unfit for drinking'.

In the first instance, refer to your Water Safety Plan where you should have recorded all identifiable risks and corrective actions. 

Actions you may need to undertake include:

  • disinfecting the water supply
  • disconnecting the water system
  • cleaning the water system
  • using alternative sources of water until your water testing indicates that your water is safe to consume again. 

You must notify your local Ministry office and Ministry of Health public health unit contacts.

Your public health unit can advise on interim measures to restore the potable water to meet the Standards. 

If your entire water supply system breaks down, it becomes a priority 1 urgent, health and safety project, which can be paid for through your 5 Year Agreement Funding.

Conserve water

Make sure water isn’t being wasted at your school. 

  • Install water meters so you can set a target to reduce water use.
  • Check for leaks and repairing them straight away.
  • Install low-flow taps and adjustable spray nozzles.
  • Have dual-flush toilets and urinals that run on timers or sensors.
  • Collect rainwater and reusing water for the school gardens.
  • Educate staff and students on ways to save water.
  • Sweep outside areas rather than hosing them.
  • Water plants later in the day to reduce water loss.

Drinking fountains 

You must provide at least one bubble fountain or similar for every 60 students in your school.

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