President of the Eketahuna swimming pool management council Ryan Seater said there had been talk of the pool closing down.
"It's due for a revamp, it's in the council's long-term budget to replace it," Mr Seater said.
"We've just got to prove to them that it's a good asset and we don't want to lose it."
Mr Seater said he had organised the event "for people to know that the pool is there to be used and to show what good facilities we have".
He also said as a keen swimmer himself he wanted to give others the opportunity to experience the sport.
"I had it as a young kid so now is the time to return the favour," he said.
Races started at 6.30pm and finished at 8.30pm, a relay race, a 25m sprint and a freediver's underwater sprint took place.
The Real Water Ninjas, Featherston, took out the relay, winning $80, and Ben Blackwell, Eketahuna, took out the 25m sprint winning $30.
A demonstration from the freedivers, with Martinborough freediver Kathryn Nevatt giving participants some tips, also took place.
Mr Seater said the swim relay would become an annual event.
"Everyone's saying they are going to put in more teams next year."