Methamphetamine use is growing and making up a disproportionate share of non-negative workplace drug test results, according to new national data from The Drug Detection Agency.

The proportion of meth detections has jumped since the start of the year:

January: 13.7%

February: 18.2%

March: 24.9%

Data is taken from TDDA’s Imperans reporting platform. Samples were taken between 1 Jan and 31 March. They are representative of meth detections versus other test results, and encompass a broad set of industries across the nation.

“Our data is showing us that more people are turning to meth when it comes to the range of drugs available, such as cannabis,” said Glenn Dobson, chief executive of TDDA.

“The surge is consistent with rising wastewater statistics and confirms that meth supply remains readily available nationwide. When access to supply is this easy, increased consumption often follows. This has serious implications for workplace safety and productivity.”

With meth now accounting for over a fifth of drug-related workplace testing results, and nearly 25% in March alone, employers and regulators alike may need to reassess risk exposure and response.

The top 10 locations showing high instances of methamphetamine detection are:

• Central North – 30.6%
• Taranaki – 27.9%
• Auckland East – 25.8%
• Taupo/Rotorua – 25%
• North Harbour – 23.6%
• Auckland West – 23.2%
• Northland – 21.7%
• Canterbury – 20%
• Southland – 13.7%
• Otago – 10.5%

“Our frontline data tells a confronting story, meth use is more than a big-city issue. We’re seeing higher proportions of meth detections in smaller regions like the Central North, The Lakes and Taranaki,” said Dobson.

“This is about safety as well as businesses and communities under pressure. Employers must stay alert, have clear workplace substance policies, and be ready to act on suspicions compliantly and quickly.”

If you suspect meth use at work:

Follow your drug and alcohol policy

Initiate the appropriate procedures as outlined in your policy, which may include a reasonable cause drug test.

Observe and record

Note physical signs like sweating, agitation, and rapid speech. Avoid confrontation and document your observations.

If required, remove them from safety-sensitive tasks immediately

Meth can cause impulsive, erratic, and unpredictable behaviour. Prioritise safety and take them off tools, machinery, or driving duties without delay.