Methodology
Where the numbers come from — and what is measured versus estimated.
Latest reading: 14 Sept 2026 · 75.0% combined 804 weekly readings
Observed data
Weekly readings come from the Department of Water and Sanitation's weekly reports for the Western Cape. The older history was rebuilt from archived reports and old PDF bulletins.
| Dam | Capacity | Storage | Level |
|---|---|---|---|
| Theewaterskloof | 479.3 GL | 363.8 GL | 75.9% |
| Voëlvlei | 158.6 GL | 92.9 GL | 58.6% |
| Berg River | 127.1 GL | 115.7 GL | 91.0% |
| Wemmershoek | 58.8 GL | 52.2 GL | 88.8% |
| Steenbras Lower | 33.9 GL | 15.7 GL | 46.2% |
| Steenbras Upper | 31.9 GL | 26.6 GL | 83.3% |
| Combined | 889.6 GL | 666.9 GL | 75.0% |