Across the country, state legislatures are stepping up with aggressive new water quality laws targeting everything from PFAS contamination to agricultural runoff, filling gaps left by shifting federal priorities.
In 2025, at least 203 bills were introduced in 37 states to address PFAS contamination alone, according to the National Caucus of Environmental Legislators. From banning PFAS in food packaging to requiring public water systems to test for these persistent chemicals, states are not waiting for federal mandates to act.
Agricultural runoff remains a major focus as well. Several Midwestern states have expanded nutrient management programs aimed at reducing the phosphorus and nitrogen pollution that fuels algae blooms and contributes to the Gulf of Mexico dead zone. These programs often include incentive-based approaches — offering technical assistance and cost-sharing to farmers who adopt cover crops, buffer strips, and precision fertilizer application.
Meanwhile, the federal Lead and Copper Rule Improvements — finalized in late 2024 — are driving states to overhaul how they manage lead service lines. Water systems must now inventory all lead pipes and develop replacement schedules, with full compliance expected within the decade. The rule represents the most significant update to lead-in-water regulations in over 30 years.
Washington State has taken a particularly proactive stance on lead in schools, with mandatory testing requirements set to begin a new five-year cycle in July 2026. Early results have already identified over 1,100 water sources in schools exceeding safety thresholds.
New York is backing its water quality ambitions with serious funding, committing $3.75 billion over five years to modernize aging water infrastructure — one of the largest state-level investments in the nation.
For water treatment professionals and facility managers, the patchwork of new state and federal requirements reinforces the importance of staying current with monitoring obligations and treatment capabilities. The regulatory landscape is evolving fast, and compliance windows are tightening.