Reservoir · Western Australia · Australia · BOM Water Data Online
Mundaring
40.1% full
Capacity
63.6 hm³
Volume stored
26 hm³
River
Helena River
Year completed
1902
Coordinates
31.987°S, 116.214°E
Last updated
2026-07-26
Current fill
40.1%vs 7 days ago
0.0%stable
vs 1 year ago
+1.6%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: 2026-07-26.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. -31.987, 116.214 · Open in Google Maps
About Mundaring
As of July 26, 2026, Mundaring is filled to 40.1% of its total capacity, holding roughly 26 hm³ of water out of a maximum 64 hm³. At this level the reservoir is within its normal operating range. Of that total, about 57 hm³ is usable (live) storage.
Over the most recent week on record the fill level has held broadly steady (+0.0 pts), and it is 1.6 points above its level on the same date a year earlier.
Across the readings we hold for Mundaring — 1061 data points between July 30, 2023 and July 26, 2026 — the level has ranged from a low of 33.2% (May 22, 2025) to a high of 66.1% (September 17, 2023). On average the reservoir is fullest around October and at its lowest around May.
The dam at Mundaring was completed in 1902. It is operated by BOM primarily for water supply. It lies within the Helena River Basin basin at 31.987°S, 116.214°E.
Key facts
- Current fill level
- 40.1%
- Water stored
- 26 hm³
- Total capacity
- 64 hm³
- Usable capacity
- 57 hm³
- 7-day change
- No change
- Year-on-year
- ▲ 1.6 pts
- Primary use
- Water supply
- River
- Helena River
- River basin
- Helena River Basin
- Year completed
- 1902
- Operator
- BOM
- Coordinates
- 31.987°S, 116.214°E
- Last updated
- July 26, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 26 Jul 2026 | 40.1% | 26 |
| 25 Jul 2026 | 40.1% | 26 |
| 24 Jul 2026 | 40.0% | 25 |
| 23 Jul 2026 | 40.0% | 25 |
| 22 Jul 2026 | 40.0% | 25 |
| 21 Jul 2026 | 39.9% | 25 |
| 20 Jul 2026 | 39.9% | 25 |
| 19 Jul 2026 | 39.8% | 25 |
| 18 Jul 2026 | 39.7% | 25 |
| 17 Jul 2026 | 39.7% | 25 |
| 16 Jul 2026 | 39.5% | 25 |
| 15 Jul 2026 | 39.4% | 25 |
Frequently asked questions
What is the current water level of Mundaring?
As of July 26, 2026, Mundaring is at 40.1% of its capacity, holding approximately 26 hm³ of water, according to BOM data.
Is Mundaring reservoir full?
No. As of July 26, 2026, Mundaring is within its normal operating range at 40.1% of its capacity, so it is not full.
Is the water level at Mundaring rising or falling?
The level at Mundaring has been broadly stable over the latest week on record (0.0 points).
How much water can Mundaring hold?
Mundaring has a total capacity of 64 hm³, of which about 57 hm³ is usable storage.
Where is Mundaring reservoir located?
Mundaring is located in Western Australia, Australia, within the Helena River Basin basin (coordinates 31.987°S, 116.214°E).
When was Mundaring dam built?
The dam at Mundaring was completed in 1902.
What is Mundaring used for?
Mundaring is used primarily for water supply, and is managed by BOM.