Intoxilyzer Calibration Results

Welcome to the official Intoxilyzer calibration results website of the Maricopa County Attorney's Office, which serves the fourth most populated county in the United States.

Our office is responsible for the prosecution of more than 35,000 felony criminal cases each year. Of the 35,000 cases, over 3200 are Adult felony DUI cases. In addition, over 2500 misdemeanor DUI cases are handled in the justice courts a year.

To facilitate the exchange of information necessary for DUI prosecutions, our office intends to make available the certified calibration documents of all instruments used in Maricopa County since 1984.

The records on this site provide defendants and their attorneys with disclosure as required by Arizona Criminal Rule 15 and satisfy the State's duty to make records available to the defense. Should the defense require any calibration records that are not contained on this site, the prosecuting attorney should be contacted immediately.

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Deputy Steven Graham is a trained and certified Quality Assurance Specialist assigned to maintain MCSO Intoxilyzer 80-000448. In July 2019, during a recertification period, Deputy Graham completed the G-4 using another deputy’s QAS card. Graham stated such during an interview in State v. Touhey, TR2019-144001. Both agencies, Maricopa County Sheriff’s Office and the Department of Public Safety, have been notified of Deputy Graham’s actions in performing the QAS duties for Intoxilyzer 80-000448 in July 2019, upon completion of any investigation by either agency the State will provide additional disclosure.