|Location||Concord, California, U.S.|
|Operated by||Six Flags|
|Previous names||Waterworld USA Concord (1995–2003)
Six Flags Waterworld (2004–2006)
Waterworld California (2006–present)
|Operating season||May through September|
|Total||25 Waterslides, 7 Complexes|
Waterworld, originally Waterworld USA, opened in 1995. It was developed by what was then Premier Parks which also leased and was operating the original WaterWorld USA, in Sacramento. Premier Parks also owned nearby Marine World Africa USA. The three parks were operated by the same management, and their close proximity made for deals so that season passes to Marine World also worked at the Waterworld USA parks. Premier Parks acquired Six Flags on April 1, 1998, and eventually changed its name to Six Flags Inc. In 1998 Six Flags began rebranding numerous properties, however, the Waterworld parks were not renamed until 2003, when they became Six Flags Waterworld. At the end of the 2006 season, Six Flags divulged itself of multiple properties including the two Waterworld parks. The Concord park was purchased by CNL Lifestyle Properties on January 11, 2007. Multiple CNL properties, including Waterworld, were operated by Premier Parks LLC — although similar in name, it was not the same company that built the park. In November 2016, CNL sold its recreational assets, including Waterworld, to EPR Properties. Premier Parks LLC continued to manage the properties. On April 27, 2017, Six Flags Entertainment Corporation announced it would take over the park's operations from Premier Parks LLC.
On June 2, 1997, the Banzai Pipeline collapsed after students piled into the water slide in an attempt to break a school record. The collapse of the water slide resulted in 32 injures and the death of an 18-year-old female. It was stated that the slide experienced weight forces three times greater than what it was designed for. This incident was featured on an episode of Dateline.
- Waterworld USA Concord (1995–2003)
- Six Flags Waterworld (2004–2006)
- Waterworld California (2007–present)
- WATERWORLD CALIFORNIA - Celebrating 20 Splashy Years of Fun in Concord. ACE NorCal. August 12, 2015. GEpCyIwVNCI. Retrieved April 28, 2017.
- "Time Warner Completes Sale of Stake in Six Flags for $440 Million in Cash | Time Warner Inc.". www.timewarner.com.
- "Six Flags owner to sell 7 parks for $312M". St. Louis Business Journal. January 11, 2007. Retrieved February 19, 2012.
- "CNL Lifestyle Sells Ski Resorts, Recreation Assets for $830M". Commercial Property Executive. November 5, 2016. Retrieved April 28, 2017.
- "Waterworld California Becomes Six Flags' 20th Property". Six Flags Entertainment Corp. April 27, 2017. Retrieved April 28, 2017.
- "Archived copy". Archived from the original on 2012-11-19. Retrieved 2014-07-16.
- Fimrite, Peter (June 4, 1997). "Napa High Mourns Loss Of Caring Honors Student". SFGate.
- http://articles.cnn.com/1997-06-05/us/9706_05_waterslide_1_water-slide-waterworld-usa-national-aquatic-safety?_s=PM:US[dead link]