Kowloon Byewash Reservoir
Kowloon · Kowloon · Kowloon catchments
Capacity
0.8 hm³
Coordinates
22.348°N, 114.148°E
Operator
Water Supplies Department (WSD)
59.8% full
Current fill
59.8%vs 7 days ago
0.0%stable
vs 1 year ago
-5.1%year-over-year
7-day trend
→stable
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 0.8 hm³ |
| Usable capacity | 0.8 hm³ |
| Year built | 1931 |
| Primary use | water supply |
| Operator | Water Supplies Department (WSD) |
| Province | Kowloon |
| Autonomous community | Kowloon |
| River basin | Kowloon catchments |
Satellite imagery: Esri, Maxar, Earthstar Geographics. 22.348, 114.148 · Open in Google Maps
About Kowloon Byewash Reservoir
As of August 16, 2026, Kowloon Byewash Reservoir is filled to 59.8% of its total capacity, holding roughly 1 hm³ of water out of a maximum 1 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has held broadly steady (+0.0 pts), and it is 5.1 points below its level on the same date a year earlier.
Across the readings we hold for Kowloon Byewash Reservoir — 181 data points between January 16, 2019 and August 16, 2026 — the level has ranged from a low of 26.0% (April 16, 2022) to a high of 100.0% (August 16, 2019). On average the reservoir is fullest around October and at its lowest around January.
The dam at Kowloon Byewash Reservoir was completed in 1931. It is operated by Water Supplies Department (WSD) primarily for water supply. It lies within the Kowloon catchments basin at 22.348°N, 114.148°E.
Key facts
- Current fill level
- 59.8%
- Water stored
- 1 hm³
- Total capacity
- 1 hm³
- 7-day change
- No change
- Year-on-year
- ▼ 5.1 pts
- Primary use
- Water supply
- River basin
- Kowloon catchments
- Year completed
- 1931
- Operator
- Water Supplies Department (WSD)
- Coordinates
- 22.348°N, 114.148°E
- Last updated
- August 16, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 16 Aug 2026 | 59.8% | 0 |
| 1 Aug 2026 | 85.4% | 1 |
| 16 Jul 2026 | 63.1% | 1 |
| 1 Jul 2026 | 58.3% | 0 |
| 16 Jun 2026 | 68.4% | 1 |
| 1 Jun 2026 | 57.3% | 0 |
| 16 May 2026 | 59.6% | 0 |
| 1 May 2026 | 60.5% | 0 |
| 16 Apr 2026 | 61.9% | 0 |
| 1 Apr 2026 | 55.9% | 0 |
| 16 Mar 2026 | 55.9% | 0 |
| 1 Mar 2026 | 55.9% | 0 |
Frequently asked questions
What is the current water level of Kowloon Byewash Reservoir?
As of August 16, 2026, Kowloon Byewash Reservoir is at 59.8% of its capacity, holding approximately 1 hm³ of water, according to WSD data.
Is Kowloon Byewash Reservoir reservoir full?
No. As of August 16, 2026, Kowloon Byewash Reservoir is within its normal operating range at 59.8% of its capacity, so it is not full.
Is the water level at Kowloon Byewash Reservoir rising or falling?
The level at Kowloon Byewash Reservoir has been broadly stable over the latest week on record (0.0 points).
How much water can Kowloon Byewash Reservoir hold?
Kowloon Byewash Reservoir has a total capacity of 1 hm³.
Where is Kowloon Byewash Reservoir reservoir located?
Kowloon Byewash Reservoir is located in Kowloon, Hong Kong, within the Kowloon catchments basin (coordinates 22.348°N, 114.148°E).
When was Kowloon Byewash Reservoir dam built?
The dam at Kowloon Byewash Reservoir was completed in 1931.
What is Kowloon Byewash Reservoir used for?
Kowloon Byewash Reservoir is used primarily for water supply, and is managed by Water Supplies Department (WSD).