Rand Water says it will reduce water supply to municipalities if the high demand continues.
The service provider is, together with the City of Johannesburg, Tshwane and Ekurhuleni, urging consumers to use water sparingly.
Spokesperson Justice Mohale said the demand from Gauteng consumers was not sustainable, despite a slight increase in the water levels in their reservoirs.
Listen to the full conversation from The Midday Report with Stephen Grootes:
This article first appeared on 702 : Rand Water urges Gauteng consumers to use water sparingly or face water shedding