Non-native plants constitute 13% of the flora. There are 4 plants classified as sensitive: Catalina Mariposa Lilly (Calochortus catalinae), Wind poppy (Stylomecon heterophylla), Santa Susana Tarweed (Hemizonia minthornii ), and Nolina Parii  Water is provided by the Calleguas Municipal Water District though the Las Virgenes Municipal Water District. Oak Park sewage is collected and treated by the Triunfo County Sanitation District at the Tapia Water Reclamation Facility on Malibu Canyon Road in Los Angeles County. A joint venture of Calleguas, Las Virgenes and the Triunfo built a pipeline and pump station in 1994 to distribute reclaimed water for landscaping and golf course irrigation. Public Libraries: Ventura County Library—one of their branches is in Oak Park; Oak Park Library and also, the nearby Agoura branch of the County of Los Angeles Public Library. Open space and parks in Oak Park are managed by the Rancho Simi Recreation and Park District. Oak Park borders the Santa Monica Mountains National Recreation Area. Trails are used for hiking, running, horseback riding, climbing, and mountain biking. Oak View, California  Oak View is an unincorporated community in Ventura County, California, United States. The community is located along the Ventura River in a narrow valley between the towns of Casitas Springs (south) and Mira Monte (north). Lake Casitas and the community of Ojai are also nearby. For statistical purposes, the United States Census Bureau has defined Oak View as a census-designated place (CDP). The census definition of the area may not precisely correspond to local understanding of the area with the same name. At the 2010 census, the population of Oak View was 4,066, down from 4,199 at the 2000 census, making it the third largest community between Ojai and the city of Ventura. Oak View was given its name in 1925 due to the garden-like appearance of its many oak groves. The town of Oak View was established as a 'bedroom community' during the late 1940s and early 1950s, primarily home to local oil industry workers who found work in nearby Ventura. Besides nearby downtown Ojai, Oak View is the only other town in the Ojai Valley with a discernible "downtown", which has developed along the Ventura Avenue/Highway 33 corridor. Oak View's 'downtown' has a number of businesses and services that have withstood the test of time and economic conditions.