Plumbosolvency
Plumbosolvency describes the ability of water to absorb lead and other metals. In New Zealand, most drinking water is plumbosolvent. This means the water can dissolve small amounts of metals it comes in contact with, like lead and copper in pipes and taps. Drinking water suppliers, consumers and building owners all need to take steps to protect against the risk of contamination by lead and other metals.
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Drinking water suppliers are responsible for the quality of drinking water up to the point of supply which is normally at the property boundary. They are required to provide drinking water that is safe and complies with the drinking water standards.
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The property owner is responsible for the risks to water safety after it passes the boundary.
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To reduce potential exposure to lead consumers should:
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only use water from cold taps for drinking and cooking
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flush cold taps used for drinking and cooking for at least 10 seconds first thing in the morning to draw fresh water through the tap
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flush cold taps used for drinking and cooking for at least two minutes if they have not been used for more than two days
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speak to your plumber about ensuring your drinking water plumbing is lead free
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choose plumbing products that are lead free.
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Testing for lead
If you are concerned, you can have your water tested for lead. It is important that you take the sample as instructed by the laboratory.