August 6th Is National Fresh Breath DayI think we have all encountered someone who needs a bit of dental hygiene. According to a survey by The Action Network, the state with the worst breath is Missouri. MissouriHow Does New Jersey Rank Regarding Fresh Breath? Good news for New Jersey: only 9 states have fresher breath, so we are in the Top ten best states with fresh breath! New Jersey's Bad Breath Index Score of 35.59 (rank #42) puts it in the bottom third of the country.