A Rhinelander High School science class set out to create a PFAS water filter while competing in a national competition. The class won’t advance in the contest, but it will still keep working on water quality. Cheryl Esslinger’s Earth and Environmental Systems class was trying to design an effective, affordable filter for water. Esslinger thought of the project after the contaminant was found in city water supplies this summer. “PFAS was found in our Rhinelander water, and the well was shut down