We can reduce stormwater volume and the amount nitrogen that reaches waterways by installing grassed channels, vegetated swales, or bioswales sometimes known as Green Stormwater Infrastructure (GSI). These are open-channels that direct runoff to areas where water can soak into the ground. In urban settings, bioswales are often located along sidewalks in public right of way areas. Swales and rain gardens treat very small drainage areas (five acres or less) and have the added benefit of capturing bacteria in stormwater.