The water sector in England and Wales "urgently needs fixing", environment secretary Steve Reed has said.
The public, environment groups and investors have been asked for their views about how the water sector can be changed by a body set up by the UK government.
The head of a new independent commission will invite ideas on how to fix England and Wales' troubled water industry.
Sir John Cunliffe, a former deputy governor of the Bank of England will launch his call for evidence in Manchester on Thursday morning.
There has been growing public anger about water company performance amid massive sewage leaks and soaring bills.
The commission, chaired by former deputy Bank of England governor Sir Jon Cunliffe, is looking for views on reform.
Reed has ruled out nationalisation, saying it would cost up to £100bn, and that waterways would continue to be polluted while private ownership structures were unpicked.
Instead, the government wants private investment to upgrade the sewerage system and reservoirs.
To get that, regulator Ofwat has allowed the water industry to raise bills, which will go up by an average of £123 a year from April.
There were 3.6 million hours of sewage spills into England's lakes, rivers and seas by water companies in 2023, which is more than double the amount of the previous year.
Reed said there are "serious" and "interlocking concerns" with the sector which need "ambitious changes", and acknowledged that "trust in the system" had "broken down on all sides".
He said there had been "poor decisions and poor performance by companies, regulatory gaps, policy instability and a history of ad-hoc changes that have left an increasingly complex system that is no longer working well for anyone".
But he said these problems were not the "inevitable" consequence of privatisation.
The government established the independent water commission promising the biggest shake up of the sector since privatisation 35 years ago.
Sir Jon is expected to recognise the widespread dissatisfaction at multiple failings and will seek submissions from regulators, investors, industry leaders and the public on potential reforms.
He will acknowledge the tensions between different regulators, the increasing demands place on the system by climate and population growth, and making the sector attractive to private investors.
His review comes as six companies are appealing against decisions by Ofwat to limit bill increases over the next five years.
The commission's report, expected in June, will not affect that process.
To try to make companies more accountable, the government has brought in a law which gives regulators the power to ban bonuses for water company bosses.
In addition, executives who fail to cooperate or obstruct investigators could face prison sentences of up to two years.