Moisture & Water Activity

Water activity (aw) and moisture content (%) can have a significant impact on microbial growth in medical and adult-use cannabis products and may be referenced as a quality indication of a licensee’s cultivation practices.

Microorganisms require active or available water (aw) to thrive, thus many regulatory bodies establish acceptability action limits to ensure cannabis flower, and some cannabis products are fully dried and cured to reduce microbial growth once available for purchase by a legal consumer.

Moisture content, by definition, is the amount of moisture in a product and is usually reported in percent (%). Oftentimes, it is calculated by heating the material in question and recording the beginning and ending weights to determine loss on drying.

US Cannalytics uses ISO-accredited methods and calibrated instruments to accurately measure moisture content and water activity across all required cannabis matrices within its state-specified programs.

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