Johannesburg Water (Joburg Water) is pleading with residents in Midrand and surrounds, to use water sparingly.
The Water Utility said in a notice to its customers, that the President Park reservoir is stressed.
The President reservoir is one of 10 highest consuming meters in the City of Johannesburg.
Residents expected to reduce consumption, are from Ivory Park, Ebony Park, Kaalfontein and Commercia.
Failure to act, will stretch affected areas to nearby Rabie Ridge, Austin View, Glen Austin, Glen Acres, uMthombo and Randjespark Estate.
Johannesburg Water said causes of the peak in water use, are on-property leaks, as well as illegal connections.