5 December 2023 – 16:00
Systems Update
Sandton Systems
All reservoirs are currently stable but on a downwards trend due to poor supply. Illovo reservoir in particular is currently low, however supplying normally. As a mitigation strategy, Sandton reservoirs will be throttled overnight to build capacity. Due to poor supply pressure, the areas fed by the Sandton direct feeds, namely Marlboro and Linbro Park, may experience poor pressure. Johannesburg Water will monitor these systems overnight.

Soweto Systems
The Soweto systems remained stable during the day under the heatwave conditions but will be affected by overnight throttling (reducing pressure and flow). The Bulk supply from Rand Water is also currently restricted as a water demand management strategy. The Zondi reservoir supply is currently at 60%, while the Power Park reservoir supply is at 50%. Areas fed by Zondi and Power Park reservoirs are affected by low pressure, while high-lying areas are affected by no water.

Midrand Systems
Most Midrand systems are currently stable; however, they are on a downwards trend due to poor supply. The Rabie Ridge reservoir is experiencing high demand and water levels are low. The reservoir is currently supplying at 30% while tower remains on bypass mode. Poor pressure can be expected in parts of the supply zone. As a mitigation strategy, Midrand reservoirs will be throttled overnight to build capacity for Wednesday.

Alexandra reservoir
The reservoir is currently low but continues to supply normally. As a mitigation strategy, Johannesburg Water will throttle the reservoir overnight to build capacity for Wednesday.

Crown Gardens reservoir
The reservoir is currently stable but on a downwards trend due to poor supply. Johannesburg Water will throttle the reservoir overnight to build capacity for Wednesday.

Aeroton reservoir
The reservoir is currently stable but on a downwards trend due to poor supply. Johannesburg Water is monitoring the impact on the supply zone, including the Orlando East reservoir (Aeroton reservoir feeds into the Orlando East reservoir).

Eagles Nest reservoir
The reservoir is critically low due to poor supply. Poor pressure is expected in high-lying areas. Johannesburg Water is monitoring the impact on the Alan Manor and Naturena reservoirs (which are supplied by the Eagles Nest reservoir).

South Hills tower
Currently supplying normally; however, Johannesburg Water is monitoring the reduced supply pressure, which may affect the pumping into the tower supply zone.
Linden 1 reservoir and tower
The reservoir is currently low due to poor supply; however, it is supplying normally. The tower is empty due to poor supply and no water is expected in the supply zone.
Commando System
• Brixton reservoir: The reservoir level is currently low but supplying normally. The outlet will be throttled overnight to build capacity for Wednesday.
• Brixton tower: The tower is supplying normally but may be affected by low reservoir level. Johannesburg Water teams continue to monitor the system.
• Hursthill 1 and 2 reservoirs: Both reservoirs are currently low and poor pressure to no water is expected in the supply zones. However, the outlets to both reservoirs are fully opened. Hursthill 1 reservoir has been configured to boost supply, while Hursthill 2 reservoir outlet will be closed overnight to build capacity for Wednesday.
• Crosby reservoir: The reservoir level remains low, however it supplied normally throughout the day, while the outlets are fully opened.
The following reservoirs will either be closed or throttled to 90% overnight to retain water and build capacity.
• Sandton: Illovo, Bryanston, and Morningside
• Soweto: Freedom Park, Doornkop West, Power Park, Orlando East, and Zondi
• Brixton
• Hursthill 2
• Crown Gardens
• Alexandra Park (closed)
• Midrand: Rabie Ridge, Grand Central, President Park, Erand, and Diepsloot
The Randjieslaagte and Berea reservoirs may be throttled overnight, if necessary, due to impact of the heatwave and due to high demand. Customers supplied by these reservoirs may experience poor pressure to no flow. Alternative water supply has been arranged for the affected areas.
Residents are requested to observe level-1 water restrictions which are implemented from 1 September to 31 March. These restrictions prohibit the use of hosepipes to water gardens, wash cars, clean driveways, as well as fill up swimming pools and water features between 06:00 and 18:00. Instead, the use of greywater is encouraged.
Ends
Issued by Johannesburg Water Communication and Marketing