Wis. Stat. § 280.97

Any person, firm or corporation who engages in or follows the business or occupation of, or advertises or holds himself, herself or itself out as or acts temporarily or otherwise as a well driller or pump installer without having first secured the required permit or certificate of registration or renewal thereof, or who otherwise violates any provision of this chapter, shall be fined not less than $10 or more than $100 or imprisoned not more than 30 days, or both. Each day during which a violation continues shall constitute a separate and distinct offense, and may be punished separately.