The town of Stratford has hired a waste water treatment expert to conduct an independent review of the blue frog treatment system which was installed in 2014. 

The blue frogs are designed to break down sewage, improve the quality of water being pumped into the Charlottetown Harbour and reduce the odour problem that has plagued the over-loaded waterfront sewage lagoons for years, especially in summer. 

"He is reviewing the one-year assessment report that was provided by the blue frog supplier and the overall operation of the facility to see if there are any other steps that can be taken to improve the operation of the plant," said Stratford chief administrative officer Robert Hughes in an email to CBC News. 

The assessment, being done by engineering consultants Stantec, will look at how the system is running and recent changes the town and the company have made that they believe may eliminate the smell.

The review will cost between $5,000 and $7,000 and the town expects a report some time in March.

Hughes said the supplier of the system, Terrapin Water, believes it is working better than it was in 2015, when the sewage lagoons continued to emit a foul stench. Last May, Mayor David Dunphy said he believed the odour problem was improving.

"There is evidence from sludge mapping that sludge digestion is taking place, and there has been some improvement in effluent parameters, but they are still not consistently meeting the requirements," said Hughes. 

Stratford wants to ensure the water coming out of the lagoon system into Charlottetown harbour meets federal and provincial guidelines.