Alcohol and chemical testing

WisDOT's Alcohol and Chemical Testing Unit is a specialized unit within the Division of State Patrol.

The program certifies and maintains evidential breath alcohol testing instruments, trains and certifies instrument operators, and provides expert testimony in court on breath alcohol and instrumentation issues.

It supports the prosecution of drunk drivers through the provision of a systematic and standardized method of measuring the breath alcohol content of impaired motorists.

Support and training for law enforcementTesting machine

​WisDOT's Alcohol and Chemical Testing Unit is also responsible for the approval of preliminary breath testing devices (PBTs), PBT operator certification and approval of ignition interlock devices.

The Chemical Testing Section’s Basic Breath Examiner Specialist Training is required for local law enforcement officers seeking to perform alcohol testing using the Intoximeter EC/IR II and preliminary breath test devices (PBTs). Upon completion of the 3-day course, successful applicants will be issued permits to conduct both evidential and preliminary breath alcohol tests.

Dates Location Facility
Mar. 14-16Franklin

Milwaukee County Sheriff’s Academy

9225 S. 68th Street, Franklin, WI 53132

Mar. 21-23Rice Lake

Northwood Technical College - Rice Lake Campus

1900 College Drive, Rice Lake, WI 54868

Apr. 25-27Rhinelander

Nicolet College - Northwoods Center

5364 College Drive, Rhinelander, WI 54501

May 23-25Neillsville

Chippewa Valley Technical College - Neillsville

11 Tiff Ave, Neillsville, WI 54456

Jun. 13-15Oshkosh

Culver Family Welcome Center - UW-Oshkosh

625 Pearl Ave, Oshkosh, WI 54901

Jun. 27-29Wausau

Northcentral Technical College

1000 W. Campus Dr, Wausau, WI 54401

Jul. 11-13Waukesha

Waukesha County Technical College - W Building

800 Main Street, Pewaukee, WI 53072

Jul. 25-27River Falls

Chippewa Valley Technical College

500 S. Wasson Lane, River Falls, WI 54022

Aug. 8-10Kenosha

UW-Parkside - Tallent Hall

900 Wood Road, Kenosha, WI 53141

Aug. 22-24La Crosse

La Crosse Center

300 S. Front Street, La Crosse, WI 54601

Sep. 12-14Superior

Northcentral Technical College

1000 W. Campus Dr, Wausau, WI 54401

Sep. 26-28Milwaukee

Milwaukee Police Training Academy

6680 N Teutonia Ave, Milwaukee, WI 53209

Oct. 3-5Milwaukee

Milwaukee Police Training Academy

6680 N Teutonia Ave, Milwaukee, WI 53209

Nov. 7-9Madison

Chemical Testing Section Office

3502 Kinsman Boulevard, Madison, WI 53704

Nov. 14-16Madison

Chemical Testing Section Office

3502 Kinsman Boulevard, Madison, WI 53704

This schedule is subject to change. Updates will be posted on this page and any affected agencies will be notified.

All applicants must be employed in police work and have department approval to attend. A completed application is required for each student.

2023 training announcement

2023 application

All sessions are filled in the order applications are received. Agencies will receive an email confirmation after applications have been processed. Confirmation letters will be emailed approximately 2 weeks before scheduled training. Questions about the application process can be directed to the Chemical Test Section at

A wait list will be established when session reaches capacity. Applications will be accepted for wait list and will be accommodated in order received. Contact the Chemical Testing Section for additional information.

The Chemical Testing Section also provides training for evidential recertification (required every two years), preliminary breath testing, and calibration of PBTs.

Contact the Chemical Testing Section at for more information about these training opportunities.

Wisconsin courts are required to order a BAIID to be installed on every vehicle owned by the offender for first offense OWI with an alcohol concentration of 0.15 or higher, for all second or subsequent OWI offense and for chemical test refusal, unless doing so would cause an undue financial hardship.

BAIIDs are leased from a service provider for the duration of the vehicle sanction, a minimum of 12 months. The lease and service agreement includes fees for installation, monthly service, and removal at the conclusion of the sanction. Other fees may be assessed by the service provider for periodic calibration, violation resets, or permanent lockout conditions, and several other categories, as indicated in the service center lists.

There are currently five BAIID models certified for use in Wisconsin. Intoxalock, LifeSafer, Low Cost, and Smart Start have been approved to install the newly approved configurations. Additional information about each is available on the manufacturer’s websites:​

Equipment requirements

BAIIDs installed after January 1, 2023, and for users with removal dates in 2024 and later, now require incorporating cameras and on-line data access for authorized users, allowing handset removal, the use of lockout codes, and elimination of temporary lockouts at vehicle start. Individuals that will be required to have their equipment updated will be contacted by their manufacturer to schedule these swaps, which will occur at no cost to users.

The monthly lease for these new devices are listed as “30-Day Lease”. Installation has been broken into two categories, with more complex ignition system estimates listed as “High End”. “Calibration” and “Reporting” fees will occur at 60-day intervals, unless repeated violations result in a “Violation Reset”. The remaining fees have been published in accordance with the new rule, and specify replacement costs for both the handset and entire system, if intentionally damaged by the user. The remaining fees (early termination, missed appointments, NSF payments, and vehicle swap) must also be disclosed.  The service center must provide a one-page summary of all possible fees at the time of installation.​

​IID contacts

​For questions on IIDs, the service center list incudes phone numbers and website links.