Dam · North West · South Africa · DWS
Kosterrivier Dam
100.8% full
Total capacity
12.42 Mm³
River
Koster River
Basin
Unknown
Primary use
water supply
Operator
DWS South Africa
Coordinates
-25.700°S, 26.904°E
Last updated
2026-06-29
Current fill
100.8%vs 7 days ago
0.0%stable
vs 1 year ago
N/A7-day trend
→stable
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.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
About Kosterrivier Dam
As of June 29, 2026, Kosterrivier Dam is filled to 100.8% of its total capacity, holding roughly 13 Mm³ of water out of a maximum 12 Mm³. At this level the reservoir is effectively full.
Over the most recent week on record the fill level has held broadly steady (+0.0 pts).
Across the readings we hold for Kosterrivier Dam — 8 data points between May 31, 2026 and June 29, 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 25.700°S, 26.904°E.
Key facts
- Current fill level
- 100.8%
- Water stored
- 13 Mm³
- Total capacity
- 12 Mm³
- 7-day change
- No change
- Primary use
- Water supply
- River
- Koster River
- River basin
- Unknown
- Operator
- DWS South Africa
- Coordinates
- 25.700°S, 26.904°E
- Last updated
- June 29, 2026
Recent readings
| Date | Fill level | Volume (Mm³) |
|---|---|---|
| 29 Jun 2026 | 100.8% | 13 |
| 22 Jun 2026 | 100.8% | 13 |
| 16 Jun 2026 | 100.8% | 13 |
| 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 29, 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 29, 2026.
Is the water level at Kosterrivier Dam rising or falling?
The level at Kosterrivier Dam has been broadly stable over the latest week on record (0.0 points).
How much water can Kosterrivier Dam hold?
Kosterrivier Dam has a total capacity of 12 Mm³.
Where is Kosterrivier Dam reservoir located?
Kosterrivier Dam is located in North West, South Africa, within the Unknown basin (coordinates 25.700°S, 26.904°E).
What is Kosterrivier Dam used for?
Kosterrivier Dam is used primarily for water supply, and is managed by DWS South Africa.
Nearby reservoirs
See also: South Africa dam levels, explained — how the DWS Weekly State of Dams report becomes the national and provincial figures.