This week's featured videos are part of a new series produced by the Minnesota Department of Health showcasing the "invisible heroes" of Minnesota's drinking water supply. In these 3-minute videos, small town water system heroes face and overcome a variety of challenges including contamination, source water shortages and aging infrastructure in order to provide safe, reliable water for their communities. Three of the videos feature small or very small water systems and the innovative strategies and partnerships they have developed to overcome their challenges. The first video looks at how the tiny community of St. Martin (pop. 350) has become the first town in the state with a biologically active treatment plant in order to effectively respond to high levels of iron and ammonia in their water. The next video explains the unique wellhead protection program developed by the City of Worthington, MN (pop. 13,000). In order to protect the City's drinking water wells from contamination, the city, along with partner Pheasants Forever, created the Worthington Wells Wildlife Management Area. And finally, here is a video about how the small city of Fairmont, MN (pop. 10,000) sprang into action when faced with increasing nitrate levels. What do all three of these smaller systems have in common? They worked collaboratively with the Minnesota Department of Health to ensure their strategies would meet with success!