Vaal Dam

As of August 31, 2026, Vaal Dam is filled to 100.6% of its total capacity, holding roughly 2,576 Mm³ of water out of a maximum 2,561 Mm³. At this level the reservoir is effectively full.

Over the most recent week on record the fill level has held broadly steady (-0.4 pts).

Across the readings we hold for Vaal Dam — 14 data points between May 31, 2026 and August 31, 2026 — the level has ranged from a low of 100.6% (August 31, 2026) to a high of 107.3% (May 31, 2026).

The dam at Vaal Dam stands 54 m tall and is a gravity dam and was completed in 1938. It is operated by DWS primarily for water supply. It lies within the Vaal basin at 26.920°S, 28.180°E.