It was hoped that the incinerator, which was built at La Collette just over five years ago, would generate £2.3 million of revenue each year by 2016 through selling electricity generated by burning the Island's waste to Jersey Electricity.
But Infrastructure Minister Eddie Noel said during a Scrutiny hearing this week that it is currently missing this target by more than £1 million.
The minister was asked to explain potential income shortfalls identified in States' financial plans by Deputy Tracey Vallois during the quarterly hearing of the Environment, Housing and Infrastructure Scrutiny Panel.
On holiday? Stay in touch with local news with JEP Extra