Senate Bill 104 mandates that all public and private schools in Wisconsin develop a comprehensive drinking water management plan within 15 months of the bill's enactment. This plan must include the identification of locations for filtered bottle-filling stations and faucets, ensure at least one filtered bottle-filling station for every 100 occupants, and establish a schedule for regular water sampling and testing for contaminants such as lead, PFOA, and PFOS. If testing reveals lead levels between one and five parts per billion, schools must check filters and retest the water. If levels exceed five parts per billion or if PFOA or PFOS are detected above state or federal standards, schools must shut off the affected water outlet, replace filters, and notify parents and guardians within 30 days.

Additionally, the bill prohibits the installation of non-filtered drinking fountains in schools and requires the Department of Public Instruction (DPI) to assist schools in complying with these regulations by providing templates, training, and information on filtered water systems. DPI is also authorized to award grants to help schools cover compliance costs, although the bill does not allocate specific funding for these grants. The bill emphasizes the importance of safe drinking water in educational environments and aims to enhance the health and safety of students by ensuring access to clean water.