



Frequently Asked Questions
50 ng/mL cut-off is the federal detection standard for THC in workplace and at-home marijuana tests. Any sample above this level is considered positive for THC, while results below are negative, showing no detectable cannabis metabolites.
THC detection time varies. Occasional users may test positive for 3–7 days, regular users up to 21 days, and heavy daily users even 30 days or longer. Staying hydrated and allowing enough detox time improves your test readiness.
It’s highly unlikely. Normal exposure to second-hand marijuana smoke will not trigger a positive THC urine test at the 50 ng/mL threshold unless the exposure is extreme and in a poorly ventilated area.
Any visible second line, even faint, means a negative THC result. Faint lines appear when THC levels are close to the 50 ng/mL cut-off but still below it, indicating that no active marijuana metabolites are present above the detection level.
The Exploro THC urine test delivers lab-level accuracy, detecting cannabis metabolites with 99 % reliability. It uses the same immunoassay method as professional drug screening labs, giving trusted results for personal or pre-employment use.