Utility Department WELCOME KEEPING WATER CLEAN & SAFE IT IS EVERYONE'S JOB TO PROTECT WATER FROM UNNECESSARY POLLUTION PRIVATE WELLS This page will help you understand having and maintaining your private well in the City of Onalaska. STATE MANDATES:    WI DNR NR123    WI DNR NR146    WI DNR NR812    WI DNR NR845 CITY ORDINANCE    Title 9 Ch 1 Utility Department | All Department's Home Page | City Home Page