Reservoir · Nevada · United States · USGS NWIS
TOPAZ LAKE NR TOPAZ, CA
65.5% full
Capacity
73.52 hm³
Volume stored
48 hm³
Coordinates
38.693°N, 119.520°W
Last updated
2026-07-29
Current fill
65.5%vs 7 days ago
-0.8%losing
vs 1 year ago
-32.3%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: 2026-07-29.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 38.693, -119.520 · Open in Google Maps
About TOPAZ LAKE NR TOPAZ, CA
As of July 29, 2026, TOPAZ LAKE NR TOPAZ, CA is filled to 65.5% of its total capacity, holding roughly 48 hm³ of water out of a maximum 74 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 (-0.8 pts), and it is 32.3 points below its level on the same date a year earlier.
Across the readings we hold for TOPAZ LAKE NR TOPAZ, CA — 1461 data points between July 30, 2022 and July 29, 2026 — the level has ranged from a low of 15.1% (May 11, 2023) to a high of 99.6% (March 24, 2024). On average the reservoir is fullest around June and at its lowest around October.
It is operated by USGS primarily for multiple purposes. It lies within the Nevada basin at 38.693°N, 119.520°W.
Key facts
- Current fill level
- 65.5%
- Water stored
- 48 hm³
- Total capacity
- 74 hm³
- 7-day change
- ▼ 0.8 pts
- Year-on-year
- ▼ 32.3 pts
- Primary use
- Multipurpose
- River basin
- Nevada
- Operator
- USGS
- Coordinates
- 38.693°N, 119.520°W
- Last updated
- July 29, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 29 Jul 2026 | 65.5% | 48 |
| 28 Jul 2026 | 66.3% | 49 |
| 27 Jul 2026 | 67.2% | 49 |
| 26 Jul 2026 | 68.0% | 50 |
| 25 Jul 2026 | 68.8% | 51 |
| 24 Jul 2026 | 69.5% | 51 |
| 23 Jul 2026 | 70.3% | 52 |
| 22 Jul 2026 | 71.1% | 52 |
| 21 Jul 2026 | 71.7% | 53 |
| 20 Jul 2026 | 72.4% | 53 |
| 19 Jul 2026 | 73.2% | 54 |
| 18 Jul 2026 | 73.9% | 54 |
Frequently asked questions
What is the current water level of TOPAZ LAKE NR TOPAZ, CA?
As of July 29, 2026, TOPAZ LAKE NR TOPAZ, CA is at 65.5% of its capacity, holding approximately 48 hm³ of water, according to USGS NWIS data.
Is TOPAZ LAKE NR TOPAZ, CA reservoir full?
No. As of July 29, 2026, TOPAZ LAKE NR TOPAZ, CA is within its normal operating range at 65.5% of its capacity, so it is not full.
Is the water level at TOPAZ LAKE NR TOPAZ, CA rising or falling?
The level at TOPAZ LAKE NR TOPAZ, CA has been broadly stable over the latest week on record (-0.8 points).
How much water can TOPAZ LAKE NR TOPAZ, CA hold?
TOPAZ LAKE NR TOPAZ, CA has a total capacity of 74 hm³.
Where is TOPAZ LAKE NR TOPAZ, CA reservoir located?
TOPAZ LAKE NR TOPAZ, CA is located in Nevada, United States, within the Nevada basin (coordinates 38.693°N, 119.520°W).
What is TOPAZ LAKE NR TOPAZ, CA used for?
TOPAZ LAKE NR TOPAZ, CA is used primarily for multiple purposes, and is managed by USGS.