Home & land contamination

Whakakinotia te kāinga me te whenua

Land contamination

For most people living on land that may have been contaminated, there will not be any effects on their health. But it is important to think about if you have young tamariki (children) or are pregnant.

Land may be contaminated due to a history of hazardous activities and industries including:

former orchards and market gardens
landfills
timber treatment
other industrial sites.

The Ministry for the Environment can provide information and guidance about contaminated land or you can contact your local regional council.

Otago

If you have any questions about property or land contamination, contact the Otago Regional Council by email or call 0800-800-033.

Southland

If you have questions about property or land contamination, contact Environment Southland via email or call 0800-768-845.

Queenstown

If you have any questions about property or land contamination, call the Pollution Hotline (available 24/7) on (03) 441-0499 (Queenstown) or (03) 443-0024 (Wanaka).

Water contamination

If you get your water from a piped water supply, it is tested regularly to meet the Drinking Water Standards for New Zealand.

If you have a bore or well on your property for drinking water or irrigation, you should have it tested 4 times a year for bacteria and once a year for nitrate.

High nitrate levels can be a health risk for the unborn babies of pregnant women and babies under 6 months old who are bottle fed.

Several laboratories can test for nitrate levels. Contact the lab before you collect your water sample. It will provide special sampling containers and recommendations. It is a good idea to test for E.coli contamination at the same time.

See this leaflet for information about nitrates in drinking water and how to find a local water testing laboratory.

Methamphetamine contamination

Your home can become contaminated with methamphetamine if the drug is made or smoked inside it.

Manufacturing methamphetamine usually results in much higher contamination than smoking. You should test for contamination if there has been suspected drug manufacturing in the house.

Health concerns are mainly related to third-hand exposure to the toxic chemicals used to make methamphetamine.

More information is available on Practical advice for homeowners and landlords on meth testing.

Written by HealthInfo clinical advisers. Last reviewed April 2025.

Sources

Page reference: 637178

Review key: HILAC-102992