A diluted drug screen means your urine sample contained too much liquid, making drug concentrations undetectable. This often happens when someone drinks excessive water before testing to mask drug use.
Dilution can happen in two ways:
Diluted samples can lead to false negatives, meaning someone using drugs might appear clean. According to the Substance Abuse and Mental Health Services Administration (SAMHSA), diluted specimens account for about 1-2% of workplace drug tests. Some employers require retesting if dilution is suspected.
If you're being tested, follow these steps:
I once observed a case where an employee drank nearly a gallon of water before a drug test, resulting in a diluted sample. They were asked to return the next day for a retest-and this time, the results were accurate.
Some believe dilution always means someone tried to cheat. However, certain medical conditions or medications can also cause dilution. Always confirm with a healthcare provider if you have concerns.
For more details, refer to SAMHSA's guidelines on workplace drug testing.