Rand Water | Integrated Annual Report 2025

WATER CONSERVATION AND DEMAND MANAGEMENT

Rand Water’s Water Conservation and Water Demand Management (WC/WDM) strategy, approved in 2017, aligns with the National Strategy, which outlines Rand Water’s strategic role in WC/WDM. This role includes: • Participating in the development of catchment strategies. • Managing water losses within Rand Water’s distribution network. • Coordinating the implementation of regional WC/WDM initiatives. • Assisting customers, where necessary, in effectively managing their water demand. CATCHMENT QUANTITY MONITORING The four (4) key dams supplying Rand Water, Katse, Mohale, Vaal, and Sterkfontein, have performed well in terms of storage levels during this reporting year, primarily due to sustained rainfall as indicated in Figure below. The IVRS total storage has been reported to be higher than the previous year’s reporting periods. DWS determines whether to impose water restrictions on all users based on the total storage levels in the IVRS at the end of the operating year (30 April). The new 2025/26 operating year commenced on 1 May 2025. Operating decisions for the new year are based on dam levels as of 30 April and scenario planning by DWS, pending demand projections from IVRS users, including Rand Water. Below is the year-to-date (YTD) potable water abstraction from the IVRS for the period January to June totals 751,489 Mm³, averaging 4,912 Mℓ/day.

RAND WATER’S ABSTRACTION FROM IVRS FOR POTABLE WATER PRODUCTION (EXCL. RAW WATER SOLD)

2.2%

3 000 2 500 2 000 1 500 1 000 500 Volume in Ml/d

10.2% above

Feb-25 823 822 730

Jan-25 411 442 365

Jun-25 2 468 2 415 2 190

May-25 2 057 2 023 1 825

Apr-25 1 645 1 593 1 460

Mar-25 1 234 1 212 1 095

Cumulative high scenario in Ml/d

Cumulative Project 1600 scenarioin Ml/d Cumulative abstraction volumes for potable water production in Ml/d

Figure 16: Rand Water abstraction volumes (cumulative for the year)

AUGMENTATION OF THE DELIVERY OF WATER TO SOUTH AFRICA Rand Water’s increased abstraction rights from the IVRS are contingent on the completion of Phase 2 of the Lesotho Highlands Water Project. This phase includes the construction of the Polihali Dam, a transfer tunnel to Katse Dam, and supporting infrastructure, aiming to boost annual supply capacity from 780 Mm³ to 1,270 Mm³, an increase of 490 Mm³ per year (approximately 1,314 Mℓ/day). According to the Lesotho Highlands Development Authority, commissioning is expected in 2028.

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Rand Water | Integrated Annual Report 2025