CBD is only supposed to have very minute and trace amounts of THC, far below the threshhold of what a drug test canbpredicy or what can make you high. However, the issue is is that this industry is vastly unregulated, not all products are created equal, and those of cheap, shody, and hurried production can have THC levels in them, not enough to get you high but high enough to make you fail a drug screen.
The lab test are on a scanable label on each container I market. I only sell local. The main problem with many products is usually not THC, but other chemicals and quality issues of mass produced product.