Reservoir · California · United States · CDEC
NHG
88.0% full
Capacity
268.17 hm³
Volume stored
236 hm³
Coordinates
38.152°N, 120.812°W
Last updated
2026-07-08
Current fill
88.0%vs 7 days ago
-0.2%losing
vs 1 year ago
-9.1%year-over-year
7-day trend
→stable
Data source: CDEC — California Dept of Water Resources — 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: 2026-07-08.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 38.152, -120.812 · Open in Google Maps
About NHG
As of July 8, 2026, NHG is filled to 88.0% of its total capacity, holding roughly 236 hm³ of water out of a maximum 268 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (-0.2 pts), and it is 9.1 points below its level on the same date a year earlier.
Across the readings we hold for NHG — 1824 data points between July 10, 2021 and July 8, 2026 — the level has ranged from a low of 22.7% (November 28, 2022) to a high of 105.0% (January 17, 2023). On average the reservoir is fullest around April and at its lowest around November.
It is operated by CDEC primarily for multiple purposes. It lies within the California basin at 38.152°N, 120.812°W.
Key facts
- Current fill level
- 88.0%
- Water stored
- 236 hm³
- Total capacity
- 268 hm³
- 7-day change
- ▼ 0.2 pts
- Year-on-year
- ▼ 9.1 pts
- Primary use
- Multipurpose
- River basin
- California
- Operator
- CDEC
- Coordinates
- 38.152°N, 120.812°W
- Last updated
- July 8, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 8 Jul 2026 | 88.0% | 236 |
| 7 Jul 2026 | 88.2% | 236 |
| 6 Jul 2026 | 88.4% | 237 |
| 5 Jul 2026 | 88.6% | 238 |
| 4 Jul 2026 | 88.8% | 238 |
| 3 Jul 2026 | 89.0% | 239 |
| 2 Jul 2026 | 89.2% | 239 |
| 1 Jul 2026 | 89.4% | 240 |
| 30 Jun 2026 | 89.7% | 240 |
| 29 Jun 2026 | 89.9% | 241 |
| 28 Jun 2026 | 90.1% | 241 |
| 27 Jun 2026 | 90.2% | 242 |
Frequently asked questions
What is the current water level of NHG?
As of July 8, 2026, NHG is at 88.0% of its capacity, holding approximately 236 hm³ of water, according to CDEC (CA DWR) data.
Is NHG reservoir full?
No. As of July 8, 2026, NHG is high at 88.0% of its capacity, so it is not full.
Is the water level at NHG rising or falling?
The level at NHG has been broadly stable over the latest week on record (-0.2 points).
How much water can NHG hold?
NHG has a total capacity of 268 hm³.
Where is NHG reservoir located?
NHG is located in California, United States, within the California basin (coordinates 38.152°N, 120.812°W).
What is NHG used for?
NHG is used primarily for multiple purposes, and is managed by CDEC.