Affordable Clean Water Infrastructure Act

This bill amends federal water pollution control funding rules to make wastewater services more affordable for low-income communities. It requires states to dedicate at least 20% of their annual federal capitalization grants toward additional subsidies for wastewater infrastructure, with an additional 10% specifically reserved for rural, small, and tribal publicly owned treatment works. States must use these funds to help ratepayers afford wastewater (including stormwater) services, excluding loans with 0% interest rates from counting toward subsidy calculations. The policy directly affects communities served by publicly owned treatment works, particularly in underserved rural and tribal areas, by mandating minimum subsidy levels from state water funds.