At an official photo call on Wednesday, theChancellor of the Exchequer Gordon Brown discussed the installation's operation and its association with Gustafson Porter, the designers of the Princess Diana memorial.
The Treasury feature has two shallow pools with circulating water either side of a central bridge, in HM Treasury's recently renovated west courtyard in Whitehall.
A treasury spokesperson subsequently confirmed that because of the summer heat and nesting birds the water feature was encountering problems, including heightened evaporation.
In addition, to be kept clean, because of the unexpected presence of wildlife, the pool has had to be regularly emptied to compensate for this.
Landscape design practice Gustafson Porter, whose Princess of Wales Memorial Fountain reopened in May (AJ 04.05.05) after 10 months of troubles and setbacks, acted as subconsultant responsible for the feature's design.
Claiming it was more of a maintenance issue, Gustafson Porter founder Neil Porter said: 'The fountain was always designed to be drained for big functions.
'I know that it is drained regularly to clean dirt off its surface, and I know that they do drain it down weekly,' he added. 'Maybe that frustrates some people but they have never complained about it.'