Reservoir · New South Wales · Australia · BOM Water Data Online
Tallowa
100.1% full
Capacity
90 hm³
Volume stored
90 hm³
River
Shoalhaven River
Year completed
1976
Coordinates
34.749°S, 150.346°E
Last updated
2026-06-10
Current fill
100.1%vs 7 days ago
-0.1%losing
vs 1 year ago
+0.4%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: 2026-06-10.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. -34.749, 150.346 · Open in Google Maps
About Tallowa
As of June 10, 2026, Tallowa is filled to 100.1% of its total capacity, holding roughly 90 hm³ of water out of a maximum 90 hm³. At this level the reservoir is effectively full. Of that total, about 84 hm³ is usable (live) storage.
Over the most recent week on record the fill level has held broadly steady (-0.1 pts), and it sits close to where it was a year earlier.
Across the readings we hold for Tallowa — 1095 data points between June 12, 2023 and June 10, 2026 — the level has ranged from a low of 90.1% (November 24, 2023) to a high of 121.2% (June 8, 2024). On average the reservoir is fullest around May and at its lowest around November.
The dam at Tallowa was completed in 1976. It is operated by BOM primarily for water supply. It lies within the Shoalhaven River Basin basin at 34.749°S, 150.346°E.
Key facts
- Current fill level
- 100.1%
- Water stored
- 90 hm³
- Total capacity
- 90 hm³
- Usable capacity
- 84 hm³
- 7-day change
- ▼ 0.1 pts
- Year-on-year
- ▲ 0.4 pts
- Primary use
- Water supply
- River
- Shoalhaven River
- River basin
- Shoalhaven River Basin
- Year completed
- 1976
- Operator
- BOM
- Coordinates
- 34.749°S, 150.346°E
- Last updated
- June 10, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 10 Jun 2026 | 100.1% | 90 |
| 9 Jun 2026 | 100.2% | 90 |
| 8 Jun 2026 | 100.1% | 90 |
| 7 Jun 2026 | 100.2% | 90 |
| 6 Jun 2026 | 100.5% | 90 |
| 5 Jun 2026 | 100.2% | 90 |
| 4 Jun 2026 | 100.3% | 90 |
| 3 Jun 2026 | 100.7% | 91 |
| 2 Jun 2026 | 100.7% | 91 |
| 1 Jun 2026 | 101.0% | 91 |
| 31 May 2026 | 101.3% | 91 |
| 30 May 2026 | 102.1% | 92 |
Frequently asked questions
What is the current water level of Tallowa?
As of June 10, 2026, Tallowa is at 100.1% of its capacity, holding approximately 90 hm³ of water, according to BOM data.
Is Tallowa reservoir full?
Tallowa is essentially full, sitting at 100.1% of capacity as of June 10, 2026.
Is the water level at Tallowa rising or falling?
The level at Tallowa has been broadly stable over the latest week on record (-0.1 points).
How much water can Tallowa hold?
Tallowa has a total capacity of 90 hm³, of which about 84 hm³ is usable storage.
Where is Tallowa reservoir located?
Tallowa is located in New South Wales, Australia, within the Shoalhaven River Basin basin (coordinates 34.749°S, 150.346°E).
When was Tallowa dam built?
The dam at Tallowa was completed in 1976.
What is Tallowa used for?
Tallowa is used primarily for water supply, and is managed by BOM.