How many mg of thc to test positive?
multipleQAs
How many ng/mL of thc for urine to typically test positive in the US? How many pg/mg of thc to for hair to test positive in the US? How many ng/mL of thc for saliva to typically test positive in the US?
50 50 ng/mL
1?1 pg/mg
0.5 ng/mL 0.5