DUI State Law · Wisconsin

Wisconsin Roadside Saliva (Oral Fluid) DUI Testing Law

How Wisconsin treats oral fluid (saliva) testing in DUI enforcement — the statute, its current status, and what that means for agencies running roadside drug screening.

Status: Authorized · Law Exists, Deployment Varies

Statute and status in Wisconsin

Statute / authority: Wis. Stat. § 343.305 (chemical test)

Chemical test under implied consent broadly defined. Oral fluid permissible; used by some agencies. No formal state program.

Reviewed Apr 2026. Always verify state law before deployment. This page summarizes OraTek's research and is not legal advice.

What this means for agencies in Wisconsin

Wisconsin's statute is broad enough to permit oral fluid, but there is no statewide program, so adoption sits with individual agencies and prosecutors. Agencies piloting saliva screening here should pair every roadside result with a preserved specimen and documented chain of custody, so a case never rests on the screen alone.

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