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The Health and Safety at Work Act 2015 (HSWA) came into force on 4 April 2016. Landlords are now classed as a PCBU (Person conducting a Business or Undertaking). Landlords must provide a safe and healthy home free from Meth contamination.


If a landlord rents out contaminated property, they are breaching their obligations under the Residential Tenancies Act 1986, the building Act and Health Act.


There have been a number of documented cases where tenants have successfully been awarded between $7500 and $50,000 from their landlords for allowing them to reside in a contaminated property. 

Protect your investment, for a similar price as baseline Meth test with the added benefit of real time methamphetamine monitoring, P Alert can protect your rental property 24/7.


Rest assured in knowing that your investment property is free from Meth contamination while giving assurance to your tenants that they are living in a safe environment.


P Alert alarm eliminates the need for costly lab verified intertenancy Baseline Meth tests, also preventing a large amount of plastic waste bi-product as a result of testing going to landfill.


Intertenancy baseline tests are not required with the installation of a monitored P Alert alarm.

The home can be immediately rented with no down time between tenancy's accruing loss of rent, which varies between 1 week for the results of a Composite Baseline Meth and beyond if contamination is found within the home.


Eliminate the unknowns. Meth is odorless and is not generally detected in the annual 3 monthly inspection of a rental property. With 24/7 documented real-time monitoring you know exactly what is going on in your property so action can be taken immediately. From our experience Meth consumption has no demographic, we have personally been involved with consumption of Meth from all members of society and property values. 


P Alert will protect the value and reputation of your asset. 


Provide immediate assurance for your tenants that the home is free from Meth contaminants. 


P Alert can potentially save $1000's in loss of rent, clean up costs and emotional stress caused as a result of meth contamination. 


P Alert monitored alarms are a huge deterrent in the smoking of Meth within properties. When occupants know the home is monitored we have reduced contamination within properties by 97%


There is a huge social cost to society in many ways from addiction to methamphetamine particularly children growing up in a negative environment. Intervention methods can be implemented with the aid of  P Alert monitored alarms, as a minimum children can be removed from that environment and upbringing. 


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P Alert services are also industry recognized pre-purchase building inspectors and have also completed over 2000 healthy home property inspections in the greater wellington area.  


We are NZQA accredited Meth samplers, a large portion of our work load is conducting Pre & inter tenancy Meth screening reports for property management companies to ensure that rental properties are free from Meth contamination. 


From our experience and documented statistics we have found Methamphetamine is widespread throughout the greater Wellington region and does not discriminate against the occupants chosen profession, situation or property demographic.


We have seen all aspects from the effects of Methamphetamine contamination in rental properties, from the stress and financial implications imposed on landlords through to families and children living within Meth contaminated properties. 


Due to the significant amount of cases seen in the community 

P Alert Services in conjunction with P Alert alarms has been established to help mitigate this serious problem. 

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Suburban Family Home
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Protect your Investment

Protect the Health & Wellbeing of Families


P Alert Meth Alarms conduct air sampling analysis every 30 minutes.


48 tests per day / 366 tests over 7 days / 1464 tests per month / 17568 tests per year



The P-Alert Alarm is a small Patented stand-alone device 1.20mm x0.65mm x0.35mm which detects Meth usage either produced or smoked in the home. P Alert It is fitted with a long-life and powerful Lithium battery and is Monitored 24/7 through our M2M security software.

The alarm detects the airborne precursors of meth in real time.
A stand-alone modem will promptly send an alarm to our M2M Monitoring Centre.
The alarm can detect all levels of air contamination and send data/values, if there is a low to moderate precursor in the air, the appropriate action can be taken, which can be written into the tenancy agreement.
Although the P-Alert Alarm is virtually impossible to tamper, it’s fitted with two tamper alarms.


The P-Alert Alarm is a patented invention manufactured in New Zealand. It has been assessed for its Quality Management System (QMS) and ISO9001 certification requirements by Telarc, an international auditor.

ESR Forensic Clandestine Laboratories NZ have independently tested and verified that P Alert MK3 detects methamphetamine vapour. 

P Alert Services limited - Installation / Tamper / Methamphetamine Detection Protocol V1 - 2021

Is formal documentation provided to property managers which outlines processes around the installation recommendations of the P Alert alarm and protocol relating to the tampering or detection of methamphetamine within the home. 

P Alert Services limited also provide guidance around legal wording which can be added to the Tenancy agreement for the installation, servicing and monitoring of the P Alert alarm. 



Guidelines for safe levels of methamphetamine

There are currently a number of approaches to defining the ‘safe level’ of methamphetamine contamination in a dwelling/space where a clandestine laboratory has been confirmed. A ‘safe level’ is considered to be a level of methamphetamine presence where no health risks are posed.

A safe level is determined by a ‘reference value’, which represents a volumetric amount of a substance that can be present without posing any risk to health. Usually, a reference value is represented by an amount of a substance for every measure of surface area tested. For example, in Australia, the currently accepted reference value is 0.5 μg/100 cm2. What this means is that for every 100 cm x 100 cm of tested surface, it would be considered safe for 0.5 micrograms (0.00000005 grams) of methamphetamine to be present.

There are different ways in which reference values are calculated, which means that it may be difficult to compare them. For example, some areas of the world use different units, how each country/region calculates a reference value varies based on what factors they take into account when completing their risk assessments.

Most existing approaches to calculating the reference value take into account a significant margin for risk (safety factor). For example, the Californian acceptable reference value of exposure is based on a study which showed that 80 μg/kg body weight/day was the lowest dose to show any effect on health, however the adopted reference level of 0.3 μg/kg body weight/day was implemented due to a safety factor to protect sensitive members of society such as children. A similar conservative approach has been taken in Australia and Colorado, taking a safety factor approximately 300 times higher than the amount found to have an effect on health in research studies.

An important point to consider is that these existing conservative approaches are based on the worst-case scenario. There is little research to demonstrate that exceeding these levels, even by a small amount, increases the risk of harmful outcomes.

Further research is needed to demonstrate exactly how much exposure to methamphetamine residue in dwellings would elicit negative health outcomes and therefore establish well informed and appropriate guidelines for future remediation work.

New Zealand guidelines were originally the same as Australia’s. However, the New Zealand Institute of Environmental Science and Research completed its own risk assessment to determine the appropriate reference level following the remediation of a dwelling where manufacturing occurred. This report found that reference levels up to 2 μg/100 cm2 pose no health risks to people, including those most vulnerable such as children. Following this recommendation, the MOH (Minisrty of Health) & New Zealand Government decided to take 1.5 μg/100 cm2 as the preferred reference level, in line with more conservative risk management approaches.

The health risks associated with methamphetamine manufacturing are highest for children who live in these environments, when compared to adults. Children’s metabolic processes are more susceptible to the effects of chemicals/ drugs than adults. The most commonly reported symptoms to methamphetamine exposure include headache, nausea/ vomiting, respiratory difficulty and eye irritation.