Dam · North West · South Africa · DWS
Kosterrivier Dam
100.8% full
Total capacity
12.5 Mm³
River
Koster River
Basin
Unknown
Primary use
water supply
Operator
DWS South Africa
Last updated
2026-06-09
Current fill
100.8%vs 7 days ago
-1.7%losing
vs 1 year ago
N/A7-day trend
↓falling
Weekly storage
Fill history — multi-year
About this dam
Data source
official
Storage data: Department of Water and Sanitation (DWS) Weekly State of Dams report, South Africa.
About Kosterrivier Dam
As of June 9, 2026, Kosterrivier Dam is filled to 100.8% of its total capacity, holding roughly 13 Mm³ of water out of a maximum 13 Mm³. At this level the reservoir is effectively full.
Over the most recent week on record the fill level has fallen by 1.7 percentage points.
Across the readings we hold for Kosterrivier Dam — 5 data points between May 31, 2026 and June 9, 2026 — the level has ranged from a low of 100.8% (June 9, 2026) to a high of 102.9% (May 31, 2026).
It is operated by DWS South Africa primarily for water supply. It lies within the Unknown basin at 0.000°N, 0.000°E.
Key facts
- Current fill level
- 100.8%
- Water stored
- 13 Mm³
- Total capacity
- 13 Mm³
- 7-day change
- ▼ 1.7 pts
- Primary use
- Water supply
- River
- Koster River
- River basin
- Unknown
- Operator
- DWS South Africa
- Coordinates
- 0.000°N, 0.000°E
- Last updated
- June 9, 2026
Recent readings
| Date | Fill level | Volume (Mm³) |
|---|---|---|
| 9 Jun 2026 | 100.8% | 13 |
| 8 Jun 2026 | 102.5% | 13 |
| 7 Jun 2026 | 102.5% | 13 |
| 3 Jun 2026 | 102.5% | 13 |
| 31 May 2026 | 102.9% | 13 |
Frequently asked questions
What is the current water level of Kosterrivier Dam?
As of June 9, 2026, Kosterrivier Dam is at 100.8% of its capacity, holding approximately 13 Mm³ of water, according to DWS South Africa data.
Is Kosterrivier Dam reservoir full?
Kosterrivier Dam is essentially full, sitting at 100.8% of capacity as of June 9, 2026.
Is the water level at Kosterrivier Dam rising or falling?
The level at Kosterrivier Dam is falling — it dropped 1.7 percentage points over the latest week on record.
How much water can Kosterrivier Dam hold?
Kosterrivier Dam has a total capacity of 13 Mm³.
Where is Kosterrivier Dam reservoir located?
Kosterrivier Dam is located in North West, South Africa, within the Unknown basin (coordinates 0.000°N, 0.000°E).
What is Kosterrivier Dam used for?
Kosterrivier Dam is used primarily for water supply, and is managed by DWS South Africa.