The Clean Water State Revolving Fund (CWSRF) is a financing tool that supports a variety of water quality protection projects, including construction of and upgrades to wastewater treatment plants, stormwater management, and energy efficiency. Funding generally takes the form of low-interest loans that cities can access through their state—but the Bipartisan Infrastructure (BIL) made important changes. Specifically, roughly half of the CWSRF funding through BIL is in forgivable loans and grants for disadvantaged communities, making it more affordable than ever to implement meaningful water projects.