Reservoir · Victoria · Australia · BOM Water Data Online
Maroondah
78.7% full
Capacity
28.2 hm³
Volume stored
22 hm³
River
Watts River
Year completed
1927
Coordinates
37.634°S, 145.564°E
Last updated
2026-09-08
Current fill
78.7%vs 7 days ago
+0.1%gaining
vs 1 year ago
+34.3%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: 2026-09-08.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. -37.634, 145.564 · Open in Google Maps
About Maroondah
As of September 8, 2026, Maroondah is filled to 78.7% of its total capacity, holding roughly 22 hm³ of water out of a maximum 28 hm³. At this level the reservoir is within its normal operating range. Of that total, about 22 hm³ is usable (live) storage.
Over the most recent week on record the fill level has held broadly steady (+0.1 pts), and it is 34.3 points above its level on the same date a year earlier.
Across the readings we hold for Maroondah — 1060 data points between September 11, 2023 and September 8, 2026 — the level has ranged from a low of 16.2% (May 12, 2025) to a high of 79.6% (October 5, 2023). On average the reservoir is fullest around December and at its lowest around May.
The dam at Maroondah was completed in 1927. It is operated by BOM primarily for water supply. It lies within the Watts River Basin basin at 37.634°S, 145.564°E.
Key facts
- Current fill level
- 78.7%
- Water stored
- 22 hm³
- Total capacity
- 28 hm³
- Usable capacity
- 22 hm³
- 7-day change
- ▲ 0.1 pts
- Year-on-year
- ▲ 34.3 pts
- Primary use
- Water supply
- River
- Watts River
- River basin
- Watts River Basin
- Year completed
- 1927
- Operator
- BOM
- Coordinates
- 37.634°S, 145.564°E
- Last updated
- September 8, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 8 Sep 2026 | 78.7% | 22 |
| 7 Sep 2026 | 78.8% | 22 |
| 6 Sep 2026 | 78.7% | 22 |
| 5 Sep 2026 | 78.6% | 22 |
| 4 Sep 2026 | 78.6% | 22 |
| 3 Sep 2026 | 78.6% | 22 |
| 2 Sep 2026 | 78.6% | 22 |
| 1 Sep 2026 | 78.6% | 22 |
| 31 Aug 2026 | 78.7% | 22 |
| 30 Aug 2026 | 78.7% | 22 |
| 29 Aug 2026 | 78.8% | 22 |
| 28 Aug 2026 | 78.8% | 22 |