Answered by Rachael, Hiring Expert at Merck & Co., Inc., on Thursday, March 10, 2016
I have worked with various companies (large and small) that include the drug screening as a part of the background investigation, and I have processed many test results with a “Negative-Dilute”, so this is not out of the ordinary. Typically, this means that there was too much water in your sample for the lab technicians to get an accurate reading. When this happens, the lab or the company you interviewed with will notify you of your results and often request that you retake the test, but also reminding you to refrain from drinking too much water 24 hours prior to your appointment with the lab. If you get a second “Negative-Dilute” after advising you to limit your water intake, it may cause suspicion with the company. Some companies have a policy in place that may not hire a candidate if they have two consecutive “Negative-Dilutes”. My advice to you is to schedule your test early in the morning, as it will have less of a chance for a diluted sample, as well as provide a more accurate result.