How long can cannabis be detected in a person's urine following use?

Cannabis can remain detectable in urine for an extended period, especially for individuals who use it frequently or in high amounts. While occasional users may have clearance times closer to 1 to 7 days, regular or heavy users can have metabolites showing up in tests for up to 30 days or even longer. This is due to the way THC, the primary psychoactive compound in cannabis, is stored in body fat and gradually released into the bloodstream, ultimately passing through the urine.

The detection window varies based on several factors, including the frequency of use, the potency of the cannabis, metabolic rate, and body fat percentage. In the situation described, a detection time of around one month is an accurate representation for chronic users, making this the correct choice.

In contrast, occasional or infrequent users typically test negative sooner, often within a shorter timeframe, which corresponds to the other options provided in the question.