Welsh Water's profits have fallen by £9 million in the last year. The company says it is due to increase in investment in the business.
Before tax, the company made a profit of £25 million, down from the £34 million it made last year.
In it's annual results, Welsh Water Dwr Cymru said it had invested £153 million in capital projects in the six months to September 2012 - £40 million more than the same period last year.
Welsh Water has been owned and managed by the not-for-profit company since 2001.
Glas Cymru Chairman, Bob Ayling, said: “I am pleased to report a period of further progress in achieving our objectives; to deliver the best possible outcomes for customers by supplying drinking water of the highest quality and safeguarding the environment, at least cost."
More top news
Cloud will thicken across all parts overnight with outbreaks of rain.
The Football Association of Wales said it is 'delighted' to be offered a chance to bid.
Ifthir Ahmed told ITV News 'a lot of work' is being done in Newport in an attempt to prevent extremism within the community.