What is the maximum blood-alcohol concentration (BAC) allowed for Maryland drivers?

You may not legally drive a motor vehicle in the State of Maryland if your BAC is 0.08 or greater. However, there is a grey zone; if your BAC is more than 0.07 but less than 0.08, an officer may still consider you impaired. If your BAC is less than 0.05, you typically will not be charged with either DUI or DWI. Of course, if you were driving a commercial vehicle with a CDL, the BAC is 0.04. Also, someone under the age of 21 may not drive with any alcohol in their blood.


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