From: Establishing legal limits for driving under the influence of marijuana
State | Legal THC limit | Collected specimen | Year effective |
---|---|---|---|
Colorado | 5.0 μg/L in blood | Blood, urine, or OF | 2013 |
Iowa | THC-COOH: 50.0 μg/L in urine | Blood or urine | 2010 |
Montana | 5.0 μg/L in blood | Blood | 2013 |
Nevada | THC: 10.0 μg/L in urine, 2.0 μg/L in blood THC-COOH: 15.0 μg/L in urine, 5.0 μg/L in blood | Blood, urine, or other bodily substance | 2003 |
Ohio | THC: 10.0 μg/L in urine, 2.0 μg/L in blood THC-COOH: 35.0 μg/L in urine, 50.0 μg/L in blood THC-COOH in combination with alcohol or other drugs: 15.0 μg/L in urine, 5.0 μg/L in blood | Blood, urine, or other bodily substance | 2006 |
Pennsylvania | THC or THC-COOH: 1.0 μg/L in blood or urine | Blood or urine | 2011 |
Washington | 5.0 μg/L in blood | Blood | 2013 |