Reservoir · Arizona · United States · USGS NWIS
Horseshoe Reservoir
26.2% full
Capacity
162.11 hm³
Volume stored
42 hm³
Coordinates
33.985°N, 111.710°W
Last updated
2026-08-12
Current fill
26.2%vs 7 days ago
0.0%stable
vs 1 year ago
-24.2%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: 2026-08-12.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 33.985, -111.710 · Open in Google Maps
About Horseshoe Reservoir
As of August 12, 2026, Horseshoe Reservoir is filled to 26.2% of its total capacity, holding roughly 42 hm³ of water out of a maximum 162 hm³. At this level the reservoir is low.
Over the most recent week on record the fill level has held broadly steady (+0.0 pts), and it is 24.2 points below its level on the same date a year earlier.
Across the readings we hold for Horseshoe Reservoir — 1460 data points between August 14, 2022 and August 12, 2026 — the level has ranged from a low of 3.7% (September 11, 2022) to a high of 82.8% (May 21, 2023). On average the reservoir is fullest around May and at its lowest around November.
It is operated by USGS primarily for multiple purposes. It lies within the Arizona basin at 33.985°N, 111.710°W.
Key facts
- Current fill level
- 26.2%
- Water stored
- 42 hm³
- Total capacity
- 162 hm³
- 7-day change
- No change
- Year-on-year
- ▼ 24.2 pts
- Primary use
- Multipurpose
- River basin
- Arizona
- Operator
- USGS
- Coordinates
- 33.985°N, 111.710°W
- Last updated
- August 12, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 12 Aug 2026 | 26.2% | 42 |
| 11 Aug 2026 | 26.4% | 43 |
| 10 Aug 2026 | 26.7% | 43 |
| 9 Aug 2026 | 26.7% | 43 |
| 8 Aug 2026 | 26.6% | 43 |
| 7 Aug 2026 | 26.4% | 43 |
| 6 Aug 2026 | 26.3% | 43 |
| 5 Aug 2026 | 26.2% | 43 |
| 4 Aug 2026 | 26.1% | 42 |
| 3 Aug 2026 | 25.9% | 42 |
| 2 Aug 2026 | 26.0% | 42 |
| 1 Aug 2026 | 26.2% | 42 |
Frequently asked questions
What is the current water level of Horseshoe Reservoir?
As of August 12, 2026, Horseshoe Reservoir is at 26.2% of its capacity, holding approximately 42 hm³ of water, according to USGS NWIS data.
Is Horseshoe Reservoir reservoir full?
No. As of August 12, 2026, Horseshoe Reservoir is low at 26.2% of its capacity, so it is not full.
Is the water level at Horseshoe Reservoir rising or falling?
The level at Horseshoe Reservoir has been broadly stable over the latest week on record (0.0 points).
How much water can Horseshoe Reservoir hold?
Horseshoe Reservoir has a total capacity of 162 hm³.
Where is Horseshoe Reservoir reservoir located?
Horseshoe Reservoir is located in Arizona, United States, within the Arizona basin (coordinates 33.985°N, 111.710°W).
What is Horseshoe Reservoir used for?
Horseshoe Reservoir is used primarily for multiple purposes, and is managed by USGS.