An audit commissioned by the Nova Scotia Utility and Review Board ( NSUARB ) and conducted by Liberty Consulting Group in 2012 found that NSP overcharged its customers by $21.8 million .
It paid too much for fuel over a two - year period .
An audit commissioned by the Nova Scotia Utility and Review Board ( NSUARB ) and conducted by Liberty Consulting Group in 2012 found that NSP overcharged its customers by $21.8 million because it paid too much for fuel over a two - year period .