Knott's Soak City; Buena Park; adjacent to Knott's Berry Farm, one of three water parks operated by parent company Knott's Berry Farm.
Knott's Soak City; Chula Vista.
Casitas Water Adventure; Ojai; offers a lazy river and a water-gushing jungle gym.
Legoland Water Park; Carlsbad; opened in May.
Raging Waters; San Dimas; the state's largest water park.
Six Flags Hurricane Harbor; Valencia; adjacent to Six Flag's Magic Mountain.
Splash Canyon Waterpark; Temecula; slated to open in summer 2011.
Splash Kingdom Water Park; Redlands; operated within Pharaoh's Adventure Park.
The Wave Waterpark; Vista; operated by the city of Vista.
Wild Rivers Waterpark; Irvine; adjacent to Verizon Wireless Amphitheater.