Alcohol Test Result statistical data obtained from this database should be interpreted with caution. Alcohol Test Results included in this database are actual state-reported data. Estimates obtained by use of this query system may differ from NHTSA's published reports. NHTSA's published estimates are based on data from the Fatality Analysis Reporting System (FARS). Unfortunately, known BAC test results are not available for all drivers and nonoccupants involved in fatal crashes. Missing data can result for a number of reasons, the most frequent of which is that persons are not always tested for alcohol.

To address the missing data issue, NHTSA has developed and employs a statistical model to estimate the likelihood that a fatal crash-involved driver or nonoccupant was sober (BAC of zero), had some alcohol (BAC of 0.01-0.09), or was intoxicated (BAC of 0.10 or greater) at the time of the crash. The statistical model is based on important characteristics of the crash including crash factors, vehicle factors, and person factors. The published estimates are a combination of actual BAC test results and estimates based on this model.

Information on state alcohol estimates are available from the National Center for Statistics and Analysis, NRD-31, 400 Seventh Street, S.W., Washington, D.C. 20590. Telephone inquiries should be addressed to Ms. Louann Hall at (202) 366-4198. FAX messages should be sent to (202) 366-7078, or via E-mail to Ms. Louann Hall (click here).

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