What is the typical drop rate for BAC after reaching peak levels?

The typical drop rate for blood alcohol concentration (BAC) after reaching peak levels is generally accepted to be around 0.015 per hour. This rate reflects the average decline in BAC due to the body's metabolism of alcohol, primarily processed by the liver.

When an individual consumes alcohol, their BAC rises until it reaches a peak level, which can vary based on various factors such as body weight, gender, and the amount of alcohol consumed. Once the peak is reached, the BAC begins to decrease as the body eliminates alcohol. The figure of 0.015 per hour is a standard benchmark used in law enforcement and public health to estimate how quickly alcohol is metabolized.

Understanding this drop rate is vital for law enforcement officers and others involved in determining sobriety, as it helps in assessing how long after drinking a person's BAC may still index above legal driving limits. This knowledge is essential for interpreting SFST results accurately and making informed decisions during evaluations.