An activist in the opposition-held part of the city, Mohammed al-Khatieb, told AFP: "There is water sometimes, but it is in short supply, and there are frequent cuts."
Khatieb also blamed shortages in opposition-held areas on regime bombings that damage or destroy key water pumps, as well as electricity shortages which make pumping water impossible.
There have also been severe water shortages in the regime-held parts of Aleppo, however.
Last week, a priest of the Freres Maristes congregation published an open letter appealing for help for war-ravaged Aleppo, where he said "the situation has become untenable". In his letter, published online, Georges Sabe said: "Since 2 June 2014, an entire city has been deprived of water... The city and its inhabitants, over two million persons, are deprived... deprived of water."
Since a major rebel onslaught in July 2012, Aleppo has been divided into rebel-controlled and regime-held areas.