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Public health alert for Waikouaiti, Karitane and Hawksbury

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Dunedin City Council and Public Health South are advising residents in Waikouaiti, Karitane and Hawksbury not to use tap water for drinking, cooking or preparing food until further notice.

The advice was issued on Tuesday, 2 February 2021, after elevated lead levels were detected during recent water sampling.

Water tankers are at several locations in both Waikouaiti and Karitane, so that people have access to clean drinking water. It is still safe to use tap water for bathing, washing hands, dishes and clothes.

  • If you have stopped consuming the tap water, you are no longer exposed to this potential source of lead.
  • By participating in blood test screening, you are helping us understand if these spikes may have happened in the past.
  • If you are concerned about your health, please see your GP for advice.

See updates from the Medical Officer of Health here.

Public meetings

Public Health South and the Dunedin City Council will report back their findings into potential lead contamination of the Waikouaiti Water Supply at a public meeting on Friday 5 March. The meeting will be held at the East Otago Events Centre, Waikouaiti at 7pm*.

The meeting will discuss the results of the blood tests that have taken place over the past few weeks. The Dunedin City Council will also update the community on its investigations into potential causes of the elevated lead levels detected in the water supply, and the next steps.

*Further advice will be given in the event we are not at COVID-19 Alert Level 1 on this date. In any scenario, the meeting will be recorded and published online.

Public meeting, 5 February 2021

A public meeting was held on Friday 5 February to share information, including health impacts of lead, what we know about the exposure so far, and about the community blood testing to help us determine the next steps for managing this from a health perspective.

A video of the meeting can be found here.

Community blood testing

Community clinics to test blood levels in Waikouaiti, Karitane and Hawksbury residents have now finished.

Until Friday 19 February, the following groups are eligible for free blood tests from their GP:

  • people who have lived or worked for at least one month in Waikouaiti, Karitane or Hawksbury over the past 12 months
  • pregnant women and formula-fed babies who have spent at least two weeks in these towns over the past 12 months.

Those being tested will also be asked to complete a questionnaire, detailing other activities such as working with lead-based paint, hunting or leadlighting, that could mean they have had a higher exposure to lead.

You will be contacted with your results. Processing these usually takes two to three days but may be available sooner. If you have not heard within three days (72 hours) please call 0800 622 683.

Frequently-asked questions

What is lead?

Lead has been a huge part of our industrial history. In the past, it has been used in paint, petrol and in range of household items. That said, it has no benefit to the human body and as we learn more about the impacts of lead, we are working towards removing it from our homes and our environments. If people are exposed to lead it can accumulate in the body over time. Prolonged exposure to a low level of contamination can lead to adverse health effects over time. People in countries such New Zealand are exposed to lead from many other sources around the home. Lead exposure is not a new problem - people have been exposed to lead for many decades. As a result of our efforts to remove lead from the environment, the amount of lead in our bodies has reduced dramatically over the generations.

Who is most vulnerable?

Infants, older people, children up to six years of age, pregnant women and their babies are the most susceptible to any adverse health effects from lead.

Is there usually lead in our water?

Lead can be present in drinking water dissolved from natural sources, or from household plumbing systems containing lead. The amount of lead dissolved will depend on the characteristics of the water and how long the water has been sitting in the pipes.

What do we know about the possible exposure so far?

The test results show that there have been some intermittent spikes of high levels in some locations, but with most results in between those spikes below the acceptable level. We do know that the water does not contain high levels of lead all the time, but it is not clear how often the spikes have happened. To ensure safety, we have advised not drinking the water until we can be assured the levels are acceptable for human health. There has only been one result so far that showed elevated levels at the reservoir. This result was in the ‘raw’ water. When treated, the result was below the maximum acceptable level. ESR has concluded that the risk to lead exposure through the Waikouaiti drinking water system is likely to be low based on a review of the available information. However, intermittent spikes of high lead levels in water is not a common situation and so previous experience and reports are few.

What actions are being taken to protect our health in the short term? What’s being done about this in the long term?

The most important action taken is that the community has been advised to stop drinking or using it for food preparation, and ensuring safe drinking water is available. By not drinking the tap water, you are no longer at risk of lead exposure from it. Boiling does not decrease lead content in water and may in fact concentrate it.

The tankered water will be available for as long as is needed. Health officials are working closely with the Council who are looking into the issue and will provide updates as soon as more information is known.

Free blood tests for lead levels will be available next week in the community. This will help us understand whether this has been an ongoing issue, and whether it has had an impact on people's health. 

The results of these tests and other investigations into the water system will help us determine the next steps. We will share the results with you and hold another public meeting.

Why are we doing blood tests, rather than other kinds of testing?

In NZ and in fact in the USA (Centres for Disease Control) recommends blood lead levels as the best way to determine lead exposure. While hair levels can be used there is no consistent standard way to measure and so results are not easily compared.

What are the side effects of elevated lead levels?

Symptoms in adults can include tiredness, mood changes, memory impairment, sleeplessness, irritability, headaches, joint pains and gastro-intestinal symptoms: lack of appetite, nausea, diarrhoea, constipation, stomach pains and weight loss. Young children may not exhibit any obvious illness but it may affect development if they have had exposure over time.

Can lead pass from a pregnant mother to her baby?

Yes, lead can pass through the placenta from pregnant women to their unborn baby, and this can be harmful for the developing baby. The level of lead that may cause harm is not yet well understood. If there are elevated levels in pregnant women, we would refer them to our specialist services for further assessment and monitoring.

Can I breastfeed my baby?

While it is possible for mothers to pass lead on to unborn babies and to infants through breastmilk, our advice is to continue breastfeeding due to all of the benefits breastfeeding gives.

What should I do if I have health concerns?

If you are unwell and have concerns about your health, please contact your usual GP, who will be able to provide you with the right health advice.


When do I get results? What does a high result mean?

Results for blood tests take 2-3 days. If a high level is detected, your GP will be notified and public health will contact you. The most important action is to identify and stop any further exposure to lead – public health will help identify any other possible sources. If blood levels are very high, then there are treatments that can be used.

What else can I do?

Making sure children’s diets are high in iron, calcium and vitamin C decreases the amount of lead they absorb. It is especially important to ensure infant formula is not made from tap water until advised otherwise.

I live in the area - how long will we have to use tankered water?

It is not yet clear how long we will ask residents to not drink tap water. This will depend on the results of the investigations into the cause of the elevated lead readings, and how easily they can be addressed.

I have not been available to get tested at the allotted dates times. How can I get my test?

You can go to your General Practitioner and arrange a test. Depending on the practice, this may be done at the practice, or a form will be given to you to take to the lab. Tests undertaken by Friday 19 February will be free. Public Health South is not requesting that people have a GP consultation if they are well, however if you do have a GP consultation due to lead exposure, the cost of this consultation will also be covered. Speak to your GP about reimbursement arrangements.

I am currently out of town but I have lived in Waikouaiti, Merton/Hawksbury Village or Karitane in the recent past?

You will need to contact your GP to arrange a test. Testing will be funded for people who have lived or worked for at least one month in Waikouaiti, Karitane or Hawksbury over the past 12 months, and for pregnant women and formula fed babies who have spent at least two weeks in these towns over the past 12 months. The funding mechanism for this is being currently being worked on. If you are charged for a test, please keep your receipt. We also ask that you contact Public Health South so that we can send you a questionnaire – the same questionnaire people have been asked to fill out at the testing centres in Waikouaiti and Karitane. Please email publichealth@southerndhb.govt.nz

How long will these tests be free?

For eligible people, the tests are free until Friday 19 February.

I have a crib in Waikouaiti or Karitane and I am only there from time to time. Am I still at risk?

The risk to people who do not permanently live or work in Waikouaiti, Karitane or Hawksbury is low. However, testing will be funded for people who have lived or worked for at least one month in Waikouaiti, Karitane or Hawksbury over the past 12 months, and for pregnant women and formula fed babies who have spent at least two weeks in these towns over the past 12 months.

What can we do to prevent exposure to lead?

More information on the Ministry of Health's website


Advice from the Ministry of Primary Industries

Can I water vegetable garden, fruit trees, lawns and other plants?

A public meeting was held on Friday 5 February to share information, including health impacts of lead, what we know about the exposure so far, and about the community blood testing to help us determine the next steps for managing this from a health perspective.

Is it safe to eat local animal products and/or animals drinking water from the local water supply?

Based on the current information received from Council, the Ministry for Primary Industries advises there is minimal risk to food safety at this stage. There would need to be longer-term exposure at high lead levels in the water to make animal products such as dairy or eggs unsafe. Lead does not typically build up in muscle tissue (meat such as beef, pork, lamb or poultry) at the levels reported in the water.

Is it safe to eat food and vegetables grown locally and watered with the local water supply?

From the current information received from the Council, MPI advises there are minimal risks to commercially grown crops in the affected areas. The lead contamination would have to be sustained and chronically over the Maximum Acceptable Value in order to affect commercial growers. The risk to animal welfare is low given that most commercial farmers use their own water supply.

Further information

An information sheet with frequently-asked questions for those in affected communities can be found here:

More information can be found on the DCC website.