The release of the meth testing and decontamination standard (NZS8510:2017), with assistance from the Ministry of Health in 2017, set a safe level at 1.5μg/100cm² per high use areas (these are areas frequently used in a property) and 3.8μg/100cm² per low use areas (eg: attic and crawl spaces).
However, in June 2018, a report undertaken by the Office of the Prime Minister’s Chief Science Advisor (the Gluckman Report) stated a level of 15μg/100cm² should be adopted as the new level at which decontamination is required.
The Tenancy Tribunal have also begun ruling a level below 15μg/100cm² is habitable, providing the testing occurred after the release of the Gluckman Report. If the property tested is a rental property, we suggest you contact Tenancy Services on 0800 836 262 to confirm their current stance on the acceptable level.
Currently many insurance companies are continuing to use the NZS8510:2017 level of 1.5μg/100cm² to decide on claims. We suggest you contact your insurance company to confirm their recommended next steps. The Ministry of Health has also continued to support a level of 1.5μg/100cm².
A final consolidated answer to a nationally accepted safe level is pending. The local authority (the relevant local council) is the organisation responsible for deciding what level is deemed acceptable in each region in regards to whether cleansing orders are issued on properties. If this is of concern to you, we recommend you
call your local council and request to speak with the person responsible for health enforcement.
As the NZS8510:2017 standard remains the best practice guide for meth testing, Healthy Homes New Zealand’s documentation must continue to be based on the level of 1.5μg/100cm² stated in this Standard.