Tai Tam Byewash Reservoir
Hong Kong Island · Hong Kong Island · Hong Kong Island catchments
Capacity
0.08 hm³
Coordinates
22.246°N, 114.214°E
Operator
Water Supplies Department (WSD)
100.0% full
Current fill
100.0%vs 7 days ago
0.0%stable
vs 1 year ago
0.0%year-over-year
7-day trend
→stable
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 0.08 hm³ |
| Usable capacity | 0.08 hm³ |
| Year built | 1904 |
| Primary use | water supply |
| Operator | Water Supplies Department (WSD) |
| Province | Hong Kong Island |
| Autonomous community | Hong Kong Island |
| River basin | Hong Kong Island catchments |
Satellite imagery: Esri, Maxar, Earthstar Geographics. 22.246, 114.214 · Open in Google Maps
About Tai Tam Byewash Reservoir
As of August 16, 2026, Tai Tam Byewash Reservoir is filled to 100.0% of its total capacity, holding roughly 0 hm³ of water out of a maximum 0 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (+0.0 pts), and it sits close to where it was a year earlier.
Across the readings we hold for Tai Tam Byewash Reservoir — 181 data points between January 16, 2019 and August 16, 2026 — the level has ranged from a low of 37.5% (May 16, 2025) to a high of 100.0% (June 16, 2019). On average the reservoir is fullest around September and at its lowest around April.
The dam at Tai Tam Byewash Reservoir was completed in 1904. It is operated by Water Supplies Department (WSD) primarily for water supply. It lies within the Hong Kong Island catchments basin at 22.246°N, 114.214°E.
Key facts
- Current fill level
- 100.0%
- Water stored
- 0 hm³
- Total capacity
- 0 hm³
- 7-day change
- No change
- Year-on-year
- No change
- Primary use
- Water supply
- River basin
- Hong Kong Island catchments
- Year completed
- 1904
- Operator
- Water Supplies Department (WSD)
- Coordinates
- 22.246°N, 114.214°E
- Last updated
- August 16, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 16 Aug 2026 | 100.0% | 0 |
| 1 Aug 2026 | 100.0% | 0 |
| 16 Jul 2026 | 100.0% | 0 |
| 1 Jul 2026 | 100.0% | 0 |
| 16 Jun 2026 | 86.3% | 0 |
| 1 Jun 2026 | 57.5% | 0 |
| 16 May 2026 | 52.5% | 0 |
| 1 May 2026 | 51.3% | 0 |
| 16 Apr 2026 | 50.0% | 0 |
| 1 Apr 2026 | 51.3% | 0 |
| 16 Mar 2026 | 55.0% | 0 |
| 1 Mar 2026 | 57.5% | 0 |
Frequently asked questions
What is the current water level of Tai Tam Byewash Reservoir?
As of August 16, 2026, Tai Tam Byewash Reservoir is at 100.0% of its capacity, holding approximately 0 hm³ of water, according to WSD data.
Is Tai Tam Byewash Reservoir reservoir full?
Tai Tam Byewash Reservoir is essentially full, sitting at 100.0% of capacity as of August 16, 2026.
Is the water level at Tai Tam Byewash Reservoir rising or falling?
The level at Tai Tam Byewash Reservoir has been broadly stable over the latest week on record (0.0 points).
How much water can Tai Tam Byewash Reservoir hold?
Tai Tam Byewash Reservoir has a total capacity of 0 hm³.
Where is Tai Tam Byewash Reservoir reservoir located?
Tai Tam Byewash Reservoir is located in Hong Kong Island, Hong Kong, within the Hong Kong Island catchments basin (coordinates 22.246°N, 114.214°E).
When was Tai Tam Byewash Reservoir dam built?
The dam at Tai Tam Byewash Reservoir was completed in 1904.
What is Tai Tam Byewash Reservoir used for?
Tai Tam Byewash Reservoir is used primarily for water supply, and is managed by Water Supplies Department (WSD).