How do they know if your blood alcohol content is higher than the legal limit? For anyone who’s ever received a DUI you know that they use a breathalyzer test at the scene of the incident. The current legal limit for your blood alcohol concentration in Utah is .08. But with the machine calculating such minuscule percentages, how can we know that it’s being completely accurate? And are there factors that could produce and false positive on a breathalyzer test? According ABC News, There are a variety of different factors that can affect a breathalyzer test outside of just your blood alcohol concentration. For example, leftover alcohol in your mouth, certain types of dental work can leave traces of alcohol in your mouth as well. Lip balm, cough syrup or other medications. Also, the conducting officers are supposed to observe the person for 15 minutes and obtain two separate breath samples. If this is done appropriately, it can definitely impact the results of the test. Don’t assume that you have no case. Call Utah Freedom fighters NOW!