The Water Preservation and Affordability Act of 2025 amends federal water pollution control laws to encourage water systems and municipalities to adopt resource preservation techniques—methods that improve water efficiency, reduce energy use, manage stormwater, and employ environmentally innovative technologies. The bill requires water system operators receiving federal loans or grants to evaluate and use these techniques "to the maximum extent practicable" when repairing, replacing, or expanding treatment facilities. The legislation increases federal funding for two key programs: it authorizes $40 million annually from 2026 through 2031 for wastewater efficiency grants and doubles funding to $50 million annually for clean water infrastructure resiliency projects from 2026 through 2031. These changes primarily affect municipalities, water utilities, and state environmental agencies that manage water systems and apply for federal water infrastructure funding.
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