Question: How many mg of thc to test positive?
Disambiguated questions and answers: question: 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?
answer: 50
50 ng/mL
1?1 pg/mg
0.5 ng/mL
0.5
Natural Questions answer: 50 ng / mL (from the Wikipedia article "Cannabis drug testing")