Wausau Council Reviews PFAS Target Levels and GAC Replacement Schedule Recommendations

Wausau Water Works is taking proactive steps to address concerns over PFAS contamination in the city's drinking water. During a recent meeting on September 2, 2025, the commission discussed and approved a plan to set target levels for PFAS and establish a schedule for replacing Granular Activated Carbon (GAC) filters, which are essential for removing these harmful substances.

The meeting highlighted the evolving nature of PFAS regulations, with the Environmental Protection Agency (EPA) proposing a target of 4 parts per trillion (ppt) for PFOA and PFOS, although this standard will not be enforceable until 2031. Currently, the Wisconsin Department of Natural Resources (DNR) maintains a standard of 70 ppt, while the Wisconsin Department of Health Services has set an advisory level of 20 ppt, with plans to align closer to the EPA's recommendations.

Scott, a key figure in the discussion, emphasized the need for the city to prepare for these changing standards while ensuring that the water treatment system remains effective and cost-efficient. The commission acknowledged that Wausau's current PFAS levels are between 30 and 40 ppt, and they expressed a commitment to strive for levels below 4 ppt, reflecting the community's desire for high-quality drinking water.

The meeting also addressed the importance of timing in implementing changes to the water treatment process, as well as the potential for experimenting with different filtration methods to enhance PFAS removal. The commission is keen on gathering data to better understand the effectiveness of their systems and to ensure compliance with future regulations.

In conclusion, Wausau Water Works is taking significant steps to ensure the safety and quality of its drinking water. By setting ambitious PFAS targets and planning for necessary infrastructure updates, the city aims to stay ahead of regulatory changes and meet the community's expectations for clean water. The commission's actions reflect a commitment to public health and environmental responsibility as they navigate the complexities of PFAS management.