Meth Toxicology Reports
A meth toxicology report is the documented laboratory result of a property contamination test. This guide explains what the report tells you, the science behind the thresholds, and how to read a result — whether you're buying, selling, letting, or making an insurance decision.
When EnviroCheck tests a property for methamphetamine contamination, the result is a meth toxicology report — a property contamination report (sometimes referred to as a toxicology report for a property) that documents whether methamphetamine residue is present on the surfaces sampled, at what concentration, and in which areas of the property. For buyers it is pre-purchase due diligence evidence. For landlords and property managers it is the documented baseline that supports rental property meth testing and Tenancy Tribunal claims. For insurers it is the independent laboratory evidence that protects a claims position. And for anyone holding a result they don't fully understand, it is the starting point for understanding meth test reports. For a detailed walkthrough, see our guide on how to read a meth toxicology report.
What a Meth Toxicology Report Includes
Every EnviroCheck report is independent, NZS 8510:2017 aligned, and built to be defensible — whether the decision in front of you is a purchase, a tenancy dispute, or an insurance claim.
The Toxicology Behind the Numbers
The thresholds on a methamphetamine laboratory report are not arbitrary. They reflect a toxicological judgement about how much surface residue may pose a risk to people living in a property. Understanding that judgement helps explain why a particular number matters — and why a single low result does not, on its own, mean a property is risk-free in every sense.
How people are exposed to surface residue
Methamphetamine residue left on surfaces can be taken into the body through three main pathways: direct skin contact with contaminated surfaces, ingestion through hand-to-mouth transfer (residue on hands is moved to food, toys, or the mouth), and inhalation of fine particles re-suspended from surfaces into the air. This is why surface-wipe sampling — not air sampling — is the standard method for assessing risk: the residue people may touch, ingest, or breathe originates on surfaces.
The Gluckman report and the threshold reset
In 2018, Sir Peter Gluckman — then the Prime Minister's Chief Science Advisor — reviewed the evidence on third-hand methamphetamine exposure (exposure to surface residue rather than active use or manufacture). The advisory concluded that the earlier 0.5 µg/100cm² guideline was not based on health-risk evidence and that low-level residue exposure posed a relatively low risk to most occupants. This review informed New Zealand's subsequent move to the current NZS 8510:2017 threshold framework, and it remains the most widely cited toxicological reference in the New Zealand methamphetamine contamination debate.
Why children and vulnerable groups are affected differently
Toxicological risk from surface residue is not uniform across all occupants. Young children are generally considered more susceptible for several reasons: they spend more time close to floors and surfaces where residue settles, they frequently put hands and objects in their mouths, and they have a lower body weight relative to the dose they may ingest. Pregnant women and individuals with existing respiratory or skin conditions may also be more sensitive. A result that may be of little concern for a healthy adult can warrant closer attention in a home with young children.
Acute exposure versus cumulative contact
A single high reading on a report may reflect a localised contamination event, while lower readings spread across multiple surfaces can indicate broader, cumulative contact over time. The toxicological concern is not only the peak concentration at one spot but the total surface area a person may come into contact with over weeks or months. This is one reason a detailed assessment — which maps contamination across a property — gives a clearer picture of actual exposure potential than a single composite screening result.
This section summarises publicly available toxicological discussion for educational purposes. It is not medical advice, a health risk assessment, or a guarantee about any specific property or occupant. Health concerns should be discussed with a qualified medical professional, and contamination concerns with a qualified independent tester. For the regulatory framework, see our guide to methamphetamine contamination.
Reading the Numbers on a Contaminated Property Report
The thresholds on a methamphetamine laboratory report are not arbitrary. They reflect a toxicological judgement about how much surface residue may pose a risk to occupants — and they differ between rental and non-rental situations.
Contaminated (Rental)
Under the 2026 Regulations, a rental property at or above 15 µg/100 cm² is considered contaminated and triggers landlord obligations.
Uninhabitable (Rental)
Above 30 µg/100 cm² a rental property is uninhabitable — tenants cannot lawfully occupy it until remediation and retesting are complete.
Beyond the rental threshold: Any detected contamination — even below 15 µg/100 cm² — can create cost, disclosure concerns, and liability for a property owner. NZS 8510:2017 remains the standard for non-rental situations including sale and purchase, insurance, and vehicle meth testing. For the full regulatory detail, see our meth testing services page.
Who Needs a Meth Toxicology Report?
Property Buyers
A pre-purchase toxicology report keeps contamination leverage on your side of the settlement. See our pre-purchase meth testing guide for buyers.
Pre-purchase meth testingLandlords & Property Managers
Pre-tenancy and exit toxicology reports create the documented baseline that protects you in Tenancy Tribunal disputes and insurance claims.
Rental property meth testingInsurance & Legal
Independent, conflict-free reports carry evidentiary weight for insurance claims and tribunal proceedings — especially from a test-only provider.
Insurance meth testingSellers & Vendors
A clean pre-sale toxicology report becomes part of your sale pack and removes the most common cause of last-minute settlement delays.
Pre-sale meth testingMeth Testing Cost & Report Pricing
A meth toxicology report is included with every EnviroCheck assessment. Meth testing starts from $249 + GST for a Baseline Screening Assessment; Enhanced Screening and Detailed Assessments using NIOSH Method 9111 are priced according to property size and sample volume. The meth testing price you pay reflects the assessment level that matches your situation — a pre-purchase screen, a tenancy baseline, or a defensible Detailed Assessment for tribunal and insurance use.
Because EnviroCheck tests and advises only — we do not remediate — your report serves your decision, not a remediation sale. For a tailored quote, request an assessment or use the quick-quote panel below.
Meth Toxicology Report FAQs
What is a meth toxicology report?
A meth toxicology report — sometimes called a property toxicology report or meth testing laboratory report — is the documented laboratory result from a methamphetamine surface-residue test. It records whether contamination is present, at what concentration (in µg/100 cm²), and in which areas of the property. EnviroCheck's reports are independent, NZS 8510:2017 aligned, and suitable for pre-purchase due diligence, pre-sale vendor evidence, Tenancy Tribunal matters and insurance claims.
How much does a meth toxicology report cost in New Zealand?
A meth toxicology report starts from $249 + GST for a Baseline Screening Assessment. The final meth testing cost depends on the property size, location, assessment level (Baseline Screening, Enhanced Screening, or Detailed Assessment) and the number of samples analysed. Contact EnviroCheck for a tailored quote for your property.
What is the legal meth contamination threshold in NZ?
Under the Residential Tenancies (Managing Methamphetamine Contamination) Regulations 2026, a rental property is considered contaminated at or above 15 µg/100 cm² and uninhabitable above 30 µg/100 cm². These thresholds apply to rental properties under the Residential Tenancies Act. NZS 8510:2017 remains the standard for non-rental situations including sale and purchase decisions, insurance, and vehicles.
Do I need a toxicology report before buying a house?
Pre-purchase meth testing is strongly recommended. Methamphetamine contamination is invisible and is not covered by a standard building inspection. A pre-purchase toxicology report gives you independent evidence to negotiate the price, require the vendor to remediate before settlement, or walk away with your deposit intact. Once the property settles, contamination that was present before you bought becomes your responsibility.
What is the difference between a screening report and a Detailed Assessment?
A Baseline Screening Assessment uses composite laboratory analysis to give an affordable overview of contamination risk. A Detailed Assessment uses NIOSH Method 9111 individual sampling room-by-room, producing the defensible evidence required for Tenancy Tribunal matters, insurance claims, and remediation scoping. Where a composite screen detects residue, individual analysis of retained extracts identifies the affected locations.
Is a meth toxicology report the same as a health risk assessment?
No. A meth toxicology report documents the presence and level of methamphetamine surface residue at a point in time. It is not a medical or health risk assessment. Health concerns should be discussed with a qualified medical professional. The report's thresholds reflect a toxicological judgement about surface-residue exposure, informed by the Gluckman review and NZS 8510:2017.
Where Toxicology Reports Fit
A meth toxicology report is the documented outcome of every EnviroCheck assessment. Explore the services that produce one for your situation.