Some residents of Cape Town's informal settlements prefer using bucket toilets, but city officials will roll-out as many portable flush toilets as possible, mayor Patricia de Lille said on Sunday.

De Lille said in a statement that some community members indicated their preference for continued use of the bucket system.

"The reality is that in some instances communities have rejected the use of PFTs (portable flush toielts) for a range of reasons. This is regrettable as... it is often the only available toilet technology for a community," said De Lille.

She said there were currently 958 bucket toilets known and serviced by the city, despite there being proper replacements ready to be distributed.

"We currently have approximately 12,500 portable flush toilets in storage. These units will now be provided to areas identified as still using the bucket system," she said.

The SA Human Rights Commission could not immediately comment on the matter.

Last week, the minister of human settlements, Tokyo Sexwale, admitted his department would not be able to provide over two million South African households with flushing toilets by December 2014.

Sexwale blamed poor management at municipalities and a lack of funds for not being able to meet the deadline, among other things.