This app was developed in the research project TREATMENT SYSTEMS DESFLUORETAÇÃO GROUNDWATER WITH PARTIAL TOP FLUORIDE PRESENCE TO SET FORTH IN DECREE MS No. 2914/2011, funded by the National Health Foundation (FUNASA) through 01/2011 Notice and its agreement FUNASA No 0388/2011, developed by the University of Santa Cruz do Sul (UNISC) through the research groups in Limnology and Industrial Systems and Processes, both registered in the National Council for Scientific and Technological Development (CNPq).