The vote comes in response to Heartland's decision to no longer operate the ambulance service in St. Joseph.
The campaign is picking up steam as election day draws near.
Supporters of the bill see it as a necessary tax for the county.
"A community this size cannot go without an ambulance service," County Commissioner Ron Hook said.
Citizens Who Care is a group that also supports the initiative. The group has spent nearly $18,000 supporting a yes vote in next Tuesday's election, even turning to Facebook.
"The fastest demographic of individuals on Facebook are people over 50," campaign consultant Colin Hoffman said. "Those are the people showing up at the polls to vote."
Opponents of the bill argue that they do not want another tax. This would be the third tax facing Buchanan County voters this year. The Use Tax passed in April and the Public Safety Tax passed in August.