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New Zealand thresholds

Methamphetamine Contamination Thresholds: New Zealand has established guidelines for methamphetamine contamination in residential properties. In 2010, the Ministry of Health recommended a decontamination limit of 0.5 µg/100 cm². This threshold was later increased to 1.5 µg/100 cm² in 2017 to balance health risks with practical remediation considerations.

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