You also need a well construction permit from the DNR. A licensed well professional usually handles this for the owner.
Learn how to maintain your well water system here and here.
Well Water Testing Recommendations
Test your well water every year for contaminants including coliform, bacteria, and nitrates. You should also test if you notice any change in taste, odor or appearance, or after flooding.
It is very important to test for nitrate in households with pregnant people, infants, and young children. Nitrate can reduce the blood's ability to carry oxygen. In infants it can cause a serious condition called "blue baby syndrome."
Visit our Drinking Water Testing page for testing information or call our lab at (608) 243-0357. We can recommend other tests depending on your well's location, age, etc.
Abandoned or unused wells can contaminate the aquifer. This can affect the safety and quality of ground water and drinking water. Financial help for well abandonment may be available from the WI Well Compensation grant program.