The Department of Water and Sanitation says the five dams serving Nelson Mandela Bay have dropped by almost two percent in a week.
In a statement issued on Wednesday, the Department said that the Algoa Water System was at 56.4% but dropped to 54.8%.
At the same time last year, the Algoa Water System was at 93.1% of capacity.
The Amatole System, serving Buffalo City, was down from 73.7- 72.7%.
The Department of Water and Sanitation says most dams across the country increased slightly in the past week due to recent rainfalls, but it says dam levels remain low.
The Vaal System consisting of 14 dams which serve, among others, Gauteng, Sasol and Eskom has seen the Vaal dam water level increase to 63.2% from 59.2% last week.
The Umgeni System, with five dams serving Ethekwini and Musunduzi, was at 48, 6% last week but increased to 48, 7% this week. The system was at 57, 2% during the same period last year.
The Bloemfontein System with four dams serving Mangaung has maintained a 37, 0% for the past two weeks. It was recorded as it lowest during the same period last year at 29, 2%.
The Polokwane System was at 54, 4% last year. The system was measured at 48, 1% last week but gained slightly to 48, 7% this week.
The Western Cape System with six dams serving the City of Cape Town was at 42% last week but dipped to 40% this week. The system was at 48, 9% last year.
The Department wishes to remind water users to continue using water sparingly and adhere to water restrictions that are imposed by their respective municipalities.