What specific substance measurements are considered during a DWI arrest in Minnesota?

Blood alcohol content (BAC) and the presence of drugs are critical factors measured during a DWI arrest in Minnesota. BAC is primarily used to determine if an individual has exceeded the legal limit for alcohol consumption, which is set at 0.08% for most drivers over the age of 21. Determining the presence of drugs is equally important, as driving under the influence of illegal substances, prescription medications, or over-the-counter drugs can impair a person's ability to operate a vehicle safely.

Testing for BAC typically involves breath tests, blood tests, or urine tests, while drug testing can be done through similar methods. By measuring both BAC and drug presence, law enforcement officers can more accurately assess a driver's impairment and enforce DWI laws. This dual measurement approach ensures that all potential substances influencing a driver’s ability to operate a vehicle are considered during an arrest.