Unexpected Alcohol Signals

A non-compliant result is a test result that is above the tester/self tester’s %BAC threshold, set to 0.000% BAC by default. Below, please find details on potential non-compliant results.


It is possible that a non-compliant reading is indicating the presence of other types of alcohol (examples: mouthwash or medications.) However, the BACtrack breathalyzer is accurately identifying the presence of alcohol.


  • Examples of common foreign substances that may cause an environmental alcohol signal include, but are not limited to:
    1. Cold, Cough, Allergy & Other Prescription Medications (Please consult with your medical provider regarding any medications you are taking)
    2. Hand Sanitizers & Other Alcohol-Based Hygiene Products
    3. Sunscreens, Lotions & Hairsprays
    4. Perfumes, Colognes & Aftershaves
    5. Mouthwashes, Toothpastes, Gum & Breath Strips
    6. Household Cleaners & Disinfectants
    7. Energy Drinks & Kombuchas
    8. Salad Dressings, Soy Sauces & Vinegar

  • If a non-compliant result is received, please follow the steps below:
    1. Check for any external sources of environmental alcohol signals.
    2. Clean or replace the current mouthpiece on the BACtrack breathalyzer.
    3. If the tester/self tester is aware of an external alcohol source, make sure to remove it and/or get the BACtrack breathalyzer far away from it.
    4. The tester/self tester should wait 15 minutes, and then test again.
    5. Continue retesting every 15 minutes until a compliant result is obtained.