Reservoir · Washington · United States · USGS NWIS
LAKE TAPPS NEAR SUMNER, WA
91.2% full
Capacity
57.6 hm³
Volume stored
53 hm³
Coordinates
47.241°N, 122.192°W
Last updated
2026-07-28
Current fill
91.2%vs 7 days ago
-0.1%losing
vs 1 year ago
-6.7%year-over-year
7-day trend
→stable
Data source: USGS National Water Information System (NWIS) — daily reservoir storage volume. Capacity is the design (normal full-pool) capacity from the US National Inventory of Dams (NID); fill % = current volume ÷ design capacity. Last reading: 2026-07-28.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 47.241, -122.192 · Open in Google Maps
About LAKE TAPPS NEAR SUMNER, WA
As of July 28, 2026, LAKE TAPPS NEAR SUMNER, WA is filled to 91.2% of its total capacity, holding roughly 53 hm³ of water out of a maximum 58 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (-0.1 pts), and it is 6.7 points below its level on the same date a year earlier.
Across the readings we hold for LAKE TAPPS NEAR SUMNER, WA — 1458 data points between July 30, 2022 and July 28, 2026 — the level has ranged from a low of 73.6% (January 6, 2023) to a high of 99.9% (May 12, 2023). On average the reservoir is fullest around May and at its lowest around January.
It is operated by USGS primarily for multiple purposes. It lies within the Washington basin at 47.241°N, 122.192°W.
Key facts
- Current fill level
- 91.2%
- Water stored
- 53 hm³
- Total capacity
- 58 hm³
- 7-day change
- ▼ 0.1 pts
- Year-on-year
- ▼ 6.7 pts
- Primary use
- Multipurpose
- River basin
- Washington
- Operator
- USGS
- Coordinates
- 47.241°N, 122.192°W
- Last updated
- July 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Jul 2026 | 91.2% | 53 |
| 27 Jul 2026 | 91.3% | 53 |
| 26 Jul 2026 | 91.4% | 53 |
| 25 Jul 2026 | 91.6% | 53 |
| 24 Jul 2026 | 91.7% | 53 |
| 23 Jul 2026 | 91.7% | 53 |
| 22 Jul 2026 | 92.0% | 53 |
| 21 Jul 2026 | 92.1% | 53 |
| 20 Jul 2026 | 92.2% | 53 |
| 19 Jul 2026 | 92.4% | 53 |
| 18 Jul 2026 | 92.5% | 53 |
| 17 Jul 2026 | 92.7% | 53 |
Frequently asked questions
What is the current water level of LAKE TAPPS NEAR SUMNER, WA?
As of July 28, 2026, LAKE TAPPS NEAR SUMNER, WA is at 91.2% of its capacity, holding approximately 53 hm³ of water, according to USGS NWIS data.
Is LAKE TAPPS NEAR SUMNER, WA reservoir full?
No. As of July 28, 2026, LAKE TAPPS NEAR SUMNER, WA is high at 91.2% of its capacity, so it is not full.
Is the water level at LAKE TAPPS NEAR SUMNER, WA rising or falling?
The level at LAKE TAPPS NEAR SUMNER, WA has been broadly stable over the latest week on record (-0.1 points).
How much water can LAKE TAPPS NEAR SUMNER, WA hold?
LAKE TAPPS NEAR SUMNER, WA has a total capacity of 58 hm³.
Where is LAKE TAPPS NEAR SUMNER, WA reservoir located?
LAKE TAPPS NEAR SUMNER, WA is located in Washington, United States, within the Washington basin (coordinates 47.241°N, 122.192°W).
What is LAKE TAPPS NEAR SUMNER, WA used for?
LAKE TAPPS NEAR SUMNER, WA is used primarily for multiple purposes, and is managed by USGS.