Does anyone know if you can sell home made soda at farmer's markets in Wisconsin?
I do not know.
It not being alcoholic, I wouldn't see the problem though.
Read through the threads at the bottom of the page too.
Each state typically has a governing organization. You may want to visit this website http://www.wifarmersmarkets.org/ for more information. They should be able to assist you.
Motto: quel che sara sara