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including: muck dredging in the St. Sebastian River, the creation of stormwater marshes to purify polluted water, and improved sedimentation and erosion control practices. While the majority of the lagoon's water within Indian River County maintains the Florida Department of Environmental Protection (DEP) designation of "Outstanding Florida Waters", lagoon water quality is poorer in the southern portion of the county. According to the 2008 DEP Surface Water Quality standards report, Class II waters exist within the northern section of the Indian River Lagoon and within the extreme southern section of the Indian River Lagoon within Indian River County. From the North Relief Canal south to the northern tip of Round Island, however, the Indian River Lagoon is designated as Class III. While Class II is a designation that allows for shellfish propagation or harvesting, Class III is a lower standard that allows for recreation, propagation and maintenance of a healthy, well-balanced population of fish and wildlife (note: Class I is sufficient for potable water, Class IV is sufficient for agricultural water supplies, and Class V is sufficient for navigation, utility, and industrial use). Among the earliest developments in the county was the construction of a massive drainage system with three outfalls to the Indian River Lagoon. Those outfalls are the Main Relief Canal, the North Relief Canal, and the South Relief Canal. Throughout the southeastern portion of Indian River County, stormwater runoff is transported to the lagoon via that drainage system. In the future, the Indian River Lagoon's water quality can be improved by reducing the amount of stormwater that flows into the lagoon as well as by improving the quality of stormwater flowing to the lagoon. In the past, excessive discharges of freshwater into the Indian River Lagoon have had an adverse impact on the lagoon's salinity. By diverting some runoff into reservoirs or wetlands that allow stormwater filtration into the surficial aquifer, the amount of stormwater runoff that flows into the Indian River Lagoon can be reduced. One project that accomplishes this is the Sebastian Stormwater Park that was recently developed by the City of Sebastian in coordination with the SJRWMD. The 166 -acre Sebastian stormwater park utilizes pumps to divert water from the Collier Canal into the park's system of interconnected ponds and wetlands. In addition to removing pollutants from stormwater runoff, those ponds and wetlands also recharge the shallow aquifer. Stormwater parks such as that not only improve water quality, but also provide passive recreation opportunities for local residents. To clean up stormwater flowing into the lagoon, the county, in late 2007, commenced construction on a filtration system to treat 200 million gallons of water per day flowing from the Main Relief Canal into the lagoon. In addition, construction of a second water quality project known as the Egret Marsh commenced in late 2008. The Egret Marsh project will treat 10 million gallons of water per day in the Lateral D canal. In the future, the county's policy should be to develop additional stormwater treatment facilities similar to the Sebastian Stormwater Park, the Main Relief Canal filtration system, and the Egret Marsh project. In the unincorporated portions of the county, stormwater parks could be constructed at locations adjacent to canals. Potential sites include the Oslo transfer station adjacent to the South Future Land Use Element 115