But he said it was never intended that the wastewater scheme would be the focus of this election for he and his colleagues.
"We set out with a clear intention of growing the district economically. But then the wastewater treatment plant became the focus because against all the advice the council carried on and signed up to a $41 million scheme.
"We've never been opposed to a wastewater scheme but we've argued that we must have one that's affordable and works," Mr Bennett said.
"The current scheme is incredibly unaffordable to many people in Whanganui and we can't let it happen."
He said the wastewater plant cannot be the sole focus of the new council.
"We need to bring families to come and live here. Opportunities for them do exist. And we can promote a lifestyle that other towns and cities can't match," he said.