Reservoir · Victoria · Australia · BOM Water Data Online
Merrimu Reservoir
86.0% full
Capacity
32.5 hm³
Volume stored
28 hm³
River
Pyrites Creek
Year completed
1986
Coordinates
37.620°S, 144.490°E
Last updated
2026-09-08
Current fill
86.0%vs 7 days ago
+0.7%gaining
vs 1 year ago
+17.7%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. -37.620, 144.490 · Open in Google Maps
About Merrimu Reservoir
As of September 8, 2026, Merrimu Reservoir is filled to 86.0% of its total capacity, holding roughly 28 hm³ of water out of a maximum 33 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (+0.7 pts), and it is 17.7 points above its level on the same date a year earlier.
Across the readings we hold for Merrimu Reservoir — 1072 data points between September 11, 2023 and September 8, 2026 — the level has ranged from a low of 56.9% (June 4, 2026) to a high of 95.7% (January 12, 2024). On average the reservoir is fullest around September and at its lowest around June.
The dam at Merrimu Reservoir was completed in 1986. It is operated by BOM primarily for water supply. It lies within the Pyrites Creek Basin basin at 37.620°S, 144.490°E.
Key facts
- Current fill level
- 86.0%
- Water stored
- 28 hm³
- Total capacity
- 33 hm³
- 7-day change
- ▲ 0.7 pts
- Year-on-year
- ▲ 17.7 pts
- Primary use
- Water supply
- River
- Pyrites Creek
- River basin
- Pyrites Creek Basin
- Year completed
- 1986
- Operator
- BOM
- Coordinates
- 37.620°S, 144.490°E
- Last updated
- September 8, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 8 Sep 2026 | 86.0% | 28 |
| 7 Sep 2026 | 85.9% | 28 |
| 6 Sep 2026 | 85.8% | 28 |
| 5 Sep 2026 | 85.6% | 28 |
| 4 Sep 2026 | 85.5% | 28 |
| 3 Sep 2026 | 85.5% | 28 |
| 2 Sep 2026 | 85.4% | 28 |
| 1 Sep 2026 | 85.3% | 28 |
| 31 Aug 2026 | 85.2% | 28 |
| 30 Aug 2026 | 85.0% | 28 |
| 29 Aug 2026 | 84.7% | 28 |
| 28 Aug 2026 | 84.4% | 27 |