The war of words over the Government takeover of Tasmania's water and sewerage utility has worsened, with the boss of the company branding it "a political stunt" and accused the Treasurer of not telling the truth.

Last week, Treasurer Peter Gutwein announced the Government would take control of TasWater in July 2018, promising to speed up water and sewerage upgrades to towns with unsuitable drinking water.

The Government has promised to complete the remainder of TasWater's 10-year program of upgrades - which began late last year - within the first five years of taking over the body.

Today TasWater's chairman, Miles Hampton, renewed his attack on Mr Gutwein, who he alleged was not telling the truth about his dealings with the organisation.

"[Mr Gutwein's] statement in Parliament, that he told us of his concern, is simply not true," Mr Hampton said.

"We have received nothing in writing from the Treasurer that expressed dissatisfaction with our progress.

"In my view, this is political stunt."

Mr Hampton said TasWater had met with Mr Gutwein nine times and was not told about the Treasurer's concerns.

"I am not sure who he told at TasWater, because he did not bother to tell either myself or our CEO … that he had any concerns about the progress in tackling the ageing infrastructure problem, not ever, not once "

Mr Hampton, who last month challenged Mr Gutwein to "demonstrate where there is a crisis", said TasWater was a three-and-a-half-year-old organisation that had made significant progress in modernising the utility.

"The reform that has been taken place in water and sewerage infrastructure in Tasmania is the largest single micro economic reform that the state has ever undertaken," he said.

"I think it is a great pity that we have become a political football."

Mr Hampton said the State Government's plan to upgrade water and sewerage infrastructure would result in a debt of $1.5 billion in four years, while TasWater's would cost $900 million in 10 years.

"Which agency will be asked to cut spending to help fund TasWater simply to bring in a rushed program that runs a significant risk of a waste of taxpayers money?"

Google my comments, Treasurer says

Mr Gutwein told ABC Radio Hobart he did not want to go over private conversations and had publicly raised his concerns over TasWater's operations prior to the takeover announcement.

"Anybody that wants to run a Google search will see I have made a significant number of public statements in regards to this issue and the fact that TasWater has needed to do more," he said.

"The fact that [Mr Hampton] is prepared to completely ignore what are statements of facts by the economic regulator, by the Environment Protection Authority, indicates on one hand he is ready to defend his organisation to the hilt, on the other that he is accepting of the status quo.

"We are not accepting of the status quo."

The latest episode of sparring comes after the Government finally moved to wrest control of the business from local government, following accusations by Mr Gutwein they had failed to make improvements to TasWater infrastructure.