Reservoir · South Australia · Australia · BOM Water Data Online
Millbrook
81.6% full
Capacity
15.7 hm³
Volume stored
13 hm³
River
River Torrens
Year completed
1918
Coordinates
34.826°S, 138.811°E
Last updated
2026-10-24
Current fill
81.6%vs 7 days ago
-2.0 pplosing
vs 1 year ago
+3.9 ppyear-over-year
7-day trend
↓falling
Drought context
Storage vs October average
113%of normal
81.6% full on 2026-10-24, against an average of 72.3% for October across 4 years of readings (+9.3 points).
Rain over the last three months · 11 October 2026
Near normal
In the three months to 11 October 2026 the area around Millbrook had rain close to normal for the season. Rainfall compared with the long-run record for the same season at this point (Copernicus Global Drought Observatory, SPI-3 index +0.13). Rain, not storage. Australia drought figures →
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: 2026-10-24.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 34.826°S, 138.811°E · Open in Google Maps
About Millbrook
As of October 24, 2026, Millbrook is filled to 81.6% of its total capacity, holding 12.83 hm³ of water out of a maximum 15.7 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has fallen by 2.0 percentage points, and it is 3.9 points above its level on the same date a year earlier.
Across the readings we hold for Millbrook — 1090 data points between October 30, 2023 and October 24, 2026 — the level has ranged from a low of 44.1% (May 25, 2024) to a high of 94.4% (September 12, 2026). On average the reservoir is fullest around September and at its lowest around May.
The dam at Millbrook was completed in 1918. It is operated by BOM primarily for water supply. It lies within the River Torrens Basin basin at 34.826°S, 138.811°E.
Key facts
- Current fill level
- 81.6% of total capacity
- Water stored
- 12.83 hm³
- Total capacity
- 15.7 hm³
- 7-day change
- ▼ 2.0 pp
- Year-on-year
- ▲ 3.9 pp
- Primary use
- Water supply
- River
- River Torrens
- River basin
- River Torrens Basin
- Year completed
- 1918
- Operator
- BOM
- Coordinates
- 34.826°S, 138.811°E
- Last updated
- October 24, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 24 Oct 2026 | 81.6% | 12.83 |
| 23 Oct 2026 | 81.5% | 12.81 |
| 22 Oct 2026 | 81.5% | 12.81 |
| 21 Oct 2026 | 81.7% | 12.84 |
| 20 Oct 2026 | 82.2% | 12.91 |
| 19 Oct 2026 | 82.6% | 12.99 |
| 18 Oct 2026 | 83.1% | 13.06 |
| 17 Oct 2026 | 83.6% | 13.13 |
| 16 Oct 2026 | 84.0% | 13.2 |
| 15 Oct 2026 | 84.4% | 13.27 |
| 14 Oct 2026 | 84.9% | 13.33 |
| 13 Oct 2026 | 85.3% | 13.41 |