Reservoir · South Australia · Australia · BOM Water Data Online
Mount Bold
33.9% full
Capacity
46.4 hm³
Volume stored
16 hm³
River
Onkaparinga River
Year completed
1938
Coordinates
35.120°S, 138.701°E
Last updated
2026-06-07
Current fill
33.9%vs 7 days ago
+0.3%gaining
vs 1 year ago
-0.9%year-over-year
7-day trend
→stable
Data source: Bureau of Meteorology — Water Data Online (KiWIS) — daily mean storage volume, quality-controlled. Capacity from the BOM Water Storages ArcGIS layer (total design capacity in ML). Last reading: 2026-06-07.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. -35.120, 138.701 · Open in Google Maps
About Mount Bold
As of June 7, 2026, Mount Bold is filled to 33.9% of its total capacity, holding roughly 16 hm³ of water out of a maximum 46 hm³. At this level the reservoir is low.
Over the most recent week on record the fill level has held broadly steady (+0.3 pts), and it sits close to where it was a year earlier.
Across the readings we hold for Mount Bold — 1091 data points between June 12, 2023 and June 7, 2026 — the level has ranged from a low of 21.0% (May 31, 2025) to a high of 79.3% (September 14, 2023). On average the reservoir is fullest around October and at its lowest around June.
The dam at Mount Bold was completed in 1938. It is operated by BOM primarily for water supply. It lies within the Onkaparinga River Basin basin at 35.120°S, 138.701°E.
Key facts
- Current fill level
- 33.9%
- Water stored
- 16 hm³
- Total capacity
- 46 hm³
- 7-day change
- ▲ 0.3 pts
- Year-on-year
- ▼ 0.9 pts
- Primary use
- Water supply
- River
- Onkaparinga River
- River basin
- Onkaparinga River Basin
- Year completed
- 1938
- Operator
- BOM
- Coordinates
- 35.120°S, 138.701°E
- Last updated
- June 7, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 7 Jun 2026 | 33.9% | 16 |
| 6 Jun 2026 | 33.6% | 16 |
| 5 Jun 2026 | 33.4% | 16 |
| 4 Jun 2026 | 33.1% | 15 |
| 3 Jun 2026 | 32.4% | 15 |
| 2 Jun 2026 | 31.5% | 15 |
| 1 Jun 2026 | 31.0% | 14 |
| 31 May 2026 | 31.1% | 14 |
| 30 May 2026 | 31.3% | 15 |
| 29 May 2026 | 31.6% | 15 |
| 28 May 2026 | 31.9% | 15 |
| 27 May 2026 | 32.1% | 15 |
Frequently asked questions
What is the current water level of Mount Bold?
As of June 7, 2026, Mount Bold is at 33.9% of its capacity, holding approximately 16 hm³ of water, according to BOM data.
Is Mount Bold reservoir full?
No. As of June 7, 2026, Mount Bold is low at 33.9% of its capacity, so it is not full.
Is the water level at Mount Bold rising or falling?
The level at Mount Bold has been broadly stable over the latest week on record (+0.3 points).
How much water can Mount Bold hold?
Mount Bold has a total capacity of 46 hm³.
Where is Mount Bold reservoir located?
Mount Bold is located in South Australia, Australia, within the Onkaparinga River Basin basin (coordinates 35.120°S, 138.701°E).
When was Mount Bold dam built?
The dam at Mount Bold was completed in 1938.
What is Mount Bold used for?
Mount Bold is used primarily for water supply, and is managed by BOM.