DWSRF funds drinking water and water supply projects, including "green" projects. Principal forgiveness available for qualifying small/disadvantaged/ rural communities for planning, design, and construction. Drinking Water State Revolving Fund (DWSRF) loans are available for the planning, design, and construction phases of public water systems. DWSRF provides low-interest loans to cities, counties, utility districts, and water authorities for drinking water infrastructure. Small, economically disadvantaged communities are eligible for principal forgiveness, which can cover a portion of the SRF loan, and will significantly reduce the amount owed. Eligibility for principal forgiveness is restricted to communities with a population of 10,000 or less combined with an ATPI of 50 or less.