Gas Prices Down Yarmouth, NS, Canada / Y95.5 News Aug 18, 2017 | 5:36 AM A little break at the pumps this morning. Gas dropped by 1.4 cents. A litre of regular self-serve is selling for $1.07.4 cents in parts of Yarmouth County. The cost of diesel also fell and is at $0.99.8 cents a litre.