"On the other hand, votes came in quickly in 2004, but petered out at 38.77 per cent.
"We're hoping for big numbers this year, and we have every reason to believe we'll get them, but we can't take anything for granted.
"The bigger the turnout, the more engaged the voting population, and that's important to any community."
Voting forms had been sent to all electors in the city, and those who had not yet received their forms needed to take action if they wanted their voice heard in the 2013 local body elections, Ms Sullivan said.
"If your papers haven't turned up by [today], you're either not enrolled or your details are out of date, and you'll need to make a special vote."
People are able to enrol to vote in the elections until Friday, October 11.
Candidates' profile statements are available at: www.ccc.govt.nz/candidates.