The competition was held at Rotorua International Stadium, and featured almost 50 bands representing a mix of high schools, cities, districts, regions, the New Zealand Police and the Scottish Society of New Zealand.
The last time the nationals were held in Rotorua was 20 years ago, in 1998.
The bands treated the CBD to a mass parade yesterday morning, to show the public "what we're all piping on about" in the association's words.
It started at 9am and finished earlier than planned, shortly after 11am.
In the results announced yesterday afternoon the Rotorua Highland Pipe Band won the top prize for the Grade 4B street march.
The top honours for Grade 1 went to the New Zealand Police, who broke the Canterbury Caledonian Society's six-year winning streak.
The announcement was met with an enormous roar, as hats and drumsticks flew in the air.
The police were even told off by announcer Keith Shiels for celebrating for too long, and not coming up to the front "in an orderly fashion" to receive their award.
A deflated-looking Canterbury Caledonian Society took the runner-up prize.
Jason Nicholl, 15, with Rotorua Highland Pipe Band.
The 17-year-old's body was found in central Timaru between two buildings on Monday March 5, four days before he was meant to compete in the nationals.
Police are still investigating his death.
After news of George's death the group considered pulling out, but the Hill family encouraged it to play.
"It has hit us all hard but the Hills insisted that going ahead with the nationals was what George would have wanted," lead drummer Cameron Dodson said.
"George was my protégé. He was very promising and well respected. He would have been at the top level in no time."
Fellow band member Fraser Pattie held a portrait of George throughout the final massed band parade on Sunday afternoon.