Requires certain water purveyors to identify, and use, alternative water supply source when perfluoralkyl or polyfluoroalkyl substances exceed maximum contaminant levels.

This bill requires New Jersey public community water systems to create and submit a plan within 120 days identifying an alternative water source to use immediately if perfluoralkyl or polyfluoroalkyl substances (PFAS) levels exceed state-established maximum contaminant levels (MCLs). It directly affects municipal water providers serving residents, mandating they switch to the pre-identified backup source upon detecting PFAS exceedances in their supply. The key mechanism is the mandatory pre-planning and immediate action requirement when PFAS limits are breached, bypassing standard Safe Drinking Water Act procedures during such events. This applies to all public community water systems in the state, with the goal of ensuring continuous safe water access during contamination events.