Rotorua's Case Mastney-Jensen finished second in the girls' slalom and third in girls' jump.
Aidan Peterson was fifth in the junior boys' slalom.
Ben Klein finished second in the men's B slalom and Steve Klein was fourth-equal in the men's 2 slalom.
Ian Rogers was second in the senior men's 4 slalom.
Ian Barker was the pick of the Rotorua competitors, winning the senior men's 3 slalom.
The other Rotorua skiers competing were Dave May, Paul Martelli, Brad Barr and Colin Peterson.
Barker said the best aspect of water skiing was practice was as much fun as competing.
"We used to ski when we were kids, but we never thought about competing until we were living in Rotorua and saw the slalom course at Blue Lake."
Anyone interested in giving water skiing a go can email admin@rwsc.nz