Residents in Evaton, Sebokeng and surrounding areas, have interrupted water supply.
The eMfuleni Municipality said this is due to an Eskom power failure, which is affecting Sonland Park, Falcon Ridge and Rand Water Amanzimtoti pump station.
The Municipality said Eskom teams are on site working on restoring power.
In addition, the Municipality said high demand is draining the Langerand reservoir. This is despite two generators, used by Rand Water.
Full pumping is expected to resume as soon as power supply is restored.