Playing the lost opportunity through in his mind, Brown said he "fell to the ground in disbelief" as his 35-foot putt hung on the lip of the last hole.
"It's just a pity that I didn't drop that final putt ... it was about 35-foot and I really had to hit it well," he said.
Despite the narrow loss, Brown mentioned support flowing in from Northland "really helped the boys", and that the result has "given the boys confidence going into next year".
Waikato number five Chris Charlton, who is new to the team, led Waikato out well all week finishing with a record of six wins from eight matches.
"I'm stoked, rapt for the boys to get over the line," Charlton said. "Thought I played well this week and happy to try to get the boys off to a good start. We came into this week wanting a win and nothing else, so it's nice to achieve that."
Waikato's win has been a great team effort, and although they are a young bunch they carry a lot of experience with four from five players being part of the win last year and all playing in the same order.
Sam Vincent, who only lost two of his eight matches, was all smiles as they achieved the win.
"All we were thinking about this year was going back-to-back so it's pretty sweet to see our name on the trophy two years in a row," he said.
"I was getting toasted at the start but just kept the faith and had a good stretch through the middle, but I'm just proud of the guys around me."
The only shining light of Otago's runner-up finish was that of Brent McEwan finishing his representative career on a high.
He defeated Denzel Iremia 2&1 in his 103rd and final game. However, he has never won the Toro Interprovincials, which will leave a small gap in his superb career.