Lessons from the implementation of residential methamphetamine contamination policies in New Zealand.

INTRODUCTION: Methamphetamine contamination of housing has been discussed as a significant issue in New Zealand. However, scientific evidence to determine a threshold level at which health harms occur is inconclusive, resulting in conflicting and changing guidance. The initial strong precautionary policy, with significant unintended impacts on vulnerable public housing tenants, dramatically changed following a scientific review. This study explores the policy response to residential methamphetamine contamination in New Zealand over the past decade. METHODS: Thematic analysis of semi-structured interviews with 13 key stakeholders involved in policy development/implementation, including those from government, industry, residential housing and academic sectors. RESULTS: Consistent application of a methamphetamine contamination threshold for housing has been problematic due to legislative and regulatory gaps. Stakeholders in the residential sector have been influenced by perceptions of methamphetamine contamination as a health risk, political views on drug use, media coverage and the testing industry's business practices. Public housing tenants have faced disadvantages when resolving methamphetamine contamination disputes. The testing industry's participation in committees shaping the regulatory response presents a possible conflict of interest. Wide media coverage heightened public anxiety about the problem but may also have stimulated policy changes to alleviate unintended consequences of the precautionary approach. DISCUSSION AND CONCLUSIONS: New Zealand's fragmented policy response to residential methamphetamine contamination is likely rooted in the lack of scientific evidence, with some key actors further exacerbating the response. Future policy development should seek to produce overarching regulation that guides the whole sector while balancing powers of the stakeholders involved.

Exploring the Adjudication of Methamphetamine-related Housing Contamination Cases in New Zealand.

Residential methamphetamine contamination in New Zealand has resulted in substantial clean-up costs and evictions. Disputes between tenants and landlords have been adjudicated by the New Zealand Tenancy Tribunal (NZTT). However, the adjudication processes applied are not covered in specific legislation, and scientific advice and related regulatory standards have evolved over time, leading to uncertainty about the consistency of decisions. This study explores the factors that have influenced adjudicators' decisions by thematically analysing 685 NZTT orders from 2014 to 2019. Landlords filed 84% of applications and tenants were deemed liable for 96% of the NZ$2.8 million damages awarded. The Tribunal's decisions were unevenly influenced by baseline testing, presence of children, experience of health issues, police intervention, and neighbours' reports. Several factors contributed to inconsistent decisions, including the contamination threshold applied, sampling methodology, establishing liability for contamination, and assessing "cleanliness". This study suggests more judicial guidance and legislation is required to resolve these cases more equitably.

Investigating the New Zealand policy response to methamphetamine-contaminated houses.

The contamination of houses from clandestine methamphetamine manufacture emerged as an issue in New Zealand in the early 2000s. This perspective reviews and discusses the series of policies developed to address methamphetamine contamination in New Zealand houses over a 15-year period, ending with the reversal of the established policy approach in 2018. The policies addressing methamphetamine contamination of New Zealand properties were influenced by a range of sources including overseas scientific guidelines, local scientific reviews, public housing agency policies, and the local methamphetamine testing industry. A post-remediation methamphetamine level of 0.5 µg/100 cm2 was initially implemented in 2010, leading to the termination of public housing tenancies, suspensions from the public housing list, and financial charges for decontamination on public housing tenants. Subsequent reviews of the policy led to some increase in the thresholds (up to 1.5-3.8 µg/100 cm2 ) and the adoption of less punitive sanction processes. A scientific review in 2018 recommended a substantial threshold increase to 15 µg/100 cm2 (a 30-fold increase on the 2010 standard), resulting in HNZ initiating a plan to compensate previously sanctioned tenants. Overreliance on the "precautionary principle"; strict interpretation of scientific guidelines; and the public housing agency's "zero tolerance approach" to drug use, contributed to an overly punitive policy approach to methamphetamine contamination in New Zealand that negatively impacted vulnerable public housing tenants, landlords, and property owners. Investigation into the extent that all possible influences had on the development of the policies, as well as the consequences of their implementation, should be undertaken.