Map extracted from a satellite-based Dam Calculator shows consistent high water volumes at the Vaal Dam over the past five years, except for a decline in January 2025. Month-to-month comparison further shows recoded higher volumes in February 2026 than February 2025. The volumes remained high in 2026, likely due to improved rainfall and increased inflows. The water volume of the Vaal Dam varies significantly depending on climatic conditions and human demand. During droughts, levels may drop below 40%, while heavy rainfall can raise levels above 100%.

https://www.ekodata.co.za/sbdvc/DamVolumes/LargeDams