District in the 1950s and 1960s because the lake did not have a filtration system in place. In the 1990s a multimillion-dollar filtration system upgrade was made to the Lake Casitas facility. The US Department of the Interior conducted a 10-year study on the lake where allowing body contact with water was explored. The study reported, "The capabilities of the current water filtration system to handle the additional burden of body contact were called into question. The system was shown to exceed current regulatory standards, and would “probably” be sufficient to mitigate body contact pollution as well." The Casitas Municipal Water District has not significantly changed the "no body contact with water" regulations in response to the facilities upgrade. Fauna What is believed to be the only nesting pair of bald eagles on Ventura County's mainland uses a large nest at the lake. See also List of dams and reservoirs in California List of lakes in California List of largest reservoirs of California References Further reading External links Casitas dam to get upgrade Lake Casitas Rowing Association Lake Casitas Recreation Area Casitas Casitas Casitas Olympic canoeing venues Olympic rowing venues Casitas Casitas