Mr Simpson said amalgamation would likely lead to rate rises for Whangarei ratepayers of up to $400 extra a year.
"The community feels this has been forced on them. They want it stopped at this point and the status quo retained," he said.
The council did not support the commission's contention that a merger would give "one voice" for Northland.
Councillor John Williamson said the "one voice" argument was just rhetoric and was promoted to make things easier for central government rather than make things better for Northlanders.
Councillor Greg Innes said the numbers opposed to the proposal showed there was no demonstrable support for amalgamation.
But commissioner Mr Morrison said: "It doesn't mean 51 per cent, it doesn't mean the majority, it means support has to be demonstrated [for it]."
He said the commission would conduct its own survey of Northlanders' views and a decision would be made after that on whether to take the proposal further.
Meanwhile, the NRC told the commissioners it cannot support the proposal and has asked the commission to do more work, then issue a fresh draft.
Council chairman Bill Shepherd said at the heart of its opposition to the current recommendation was the commission's heavy reliance on "community boards".