"I have been working hugely on my mental and physical self in preparation for worlds," she said. "I want to ski to my absolute potential without letting the pressure get to me."
Northern Region Water Ski Association president Glen Williams said the selection reflected the region's success, with Northland the top team at the nationals for four years.
"The selection is an awesome achievement," he said. "Especially for Toni, this is massive, it's the pinnacle for her."
Atkinson said she was addicted to the adrenaline, energy and joy the sport provided her.
"I love it because there is no other place in the world where I feel more at home than out on the water," she said.
"All the hard work, compromises, time, money and energy put in paid off. It really is a blessing to get to do what I love at a competitive level."
Williams has also been named in the Under-17 New Zealand team and will compete in the Ukraine next July.