State-level drinking water regulations prove remarkably effective at driving down harmful chemical exposure when federal action stalls. Analysis of nearly two decades of water testing data demonstrates how proactive regulatory frameworks can protect public health before national standards emerge. New Jersey's pioneering approach to regulating PFAS chemicals in drinking water achieved substantial reductions across three major forever chemicals between 2006 and 2025. The state established maximum contaminant levels of 13-14 ng/L for PFOA, PFOS, and PFNA—stricter than many proposed federal standards. Following implementation of these regulations, water systems showed a 55% decline in PFOA concentrations, with similar dramatic drops observed for PFOS and PFNA. The proportion of water samples exceeding safe levels plummeted from 49% to 15% for PFOA, 12% to 4% for PFOS, and 24% to 2% for PFNA. The research tracked 47 community water systems using interrupted time series analysis, providing robust evidence that regulatory pressure directly drove remediation efforts. Water utilities responded by installing advanced treatment technologies, switching to alternative sources, or blending contaminated supplies with cleaner water. This state-level success story offers a blueprint for other jurisdictions grappling with PFAS contamination while awaiting federal action. The findings validate the effectiveness of setting science-based drinking water standards even when they exceed federal requirements. However, the analysis reveals ongoing challenges—some systems continue struggling to meet the stringent standards, and enforcement mechanisms remain critical for sustained compliance. The research underscores how regulatory leadership at the state level can accelerate public health protection and drive innovation in water treatment technologies.