The premier 10km championship was won by the experienced Stefannie Gillespie, 22, with Australia's Kate Dryden and New Caledonia's Maiana Flament making up the top four. The top three were separated by nine seconds after exactly two hours and 12 minutes of racing.
In the 5km event it was visitor Flament who got the touch just six seconds ahead of first New Zealander Pugh in a time of 1:05:34 with Hamilton's Kaitlyn Sosa a further three seconds back.
In an added bonus Pugh has met the Swimming NZ selection criteria for the national team to travel to Papua New Guinea for the Oceania Swimming Championship in June.
Other club success in the shorter NZ Secondary Schools Championship events saw a gold go to Louis Fitzjohn in the 1km while Connor Farrell finished strongly for 4th in the 2.5km event.
In the associated epic open water events Greerton Club age group results were: 100m Poppy Richardson 1st, Grace Richardson 9th; 500m Caitlin Farrell 1st, Will Quin 1st, Zach Quin 5th, Dulcie Copeland 7th; 1km event bronze to Millie Quin, Brooke Ross 17th, Talitha McEwan 21st; 5km Talitha McEwen finished 4th.