Reservoir · Arizona · United States · USGS NWIS
Saguaro Lake
94.5% full
Capacity
86.05 hm³
Volume stored
81 hm³
Coordinates
33.566°N, 111.536°W
Last updated
2026-08-02
Current fill
94.5%vs 7 days ago
+0.7%gaining
vs 1 year ago
-1.1%year-over-year
7-day trend
→stable
Data source: USGS National Water Information System (NWIS) — daily reservoir storage volume. Design capacity is unavailable for this site, so fill % is estimated against the 5-year maximum storage and may overstate fullness. Last reading: 2026-08-02.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 33.566, -111.536 · Open in Google Maps
About Saguaro Lake
As of August 2, 2026, Saguaro Lake is filled to 94.5% of its total capacity, holding roughly 81 hm³ of water out of a maximum 86 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (+0.7 pts), and it is 1.1 points below its level on the same date a year earlier.
Across the readings we hold for Saguaro Lake — 1097 data points between August 2, 2023 and August 2, 2026 — the level has ranged from a low of 89.5% (May 30, 2024) to a high of 98.9% (May 20, 2025). On average the reservoir is fullest around July and at its lowest around December.
It is operated by SRP primarily for multiple purposes. It lies within the Salt River basin at 33.566°N, 111.536°W.
Key facts
- Current fill level
- 94.5%
- Water stored
- 81 hm³
- Total capacity
- 86 hm³
- 7-day change
- ▲ 0.7 pts
- Year-on-year
- ▼ 1.1 pts
- Primary use
- Multipurpose
- River
- Salt River
- River basin
- Salt River
- Operator
- SRP
- Coordinates
- 33.566°N, 111.536°W
- Last updated
- August 2, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 2 Aug 2026 | 94.5% | 81 |
| 1 Aug 2026 | 93.8% | 81 |
| 31 Jul 2026 | 93.1% | 80 |
| 30 Jul 2026 | 94.0% | 81 |
| 29 Jul 2026 | 95.1% | 82 |
| 28 Jul 2026 | 93.3% | 80 |
| 27 Jul 2026 | 94.8% | 82 |
| 26 Jul 2026 | 95.5% | 82 |
| 25 Jul 2026 | 94.9% | 82 |
| 24 Jul 2026 | 94.6% | 81 |
| 23 Jul 2026 | 93.9% | 81 |
| 22 Jul 2026 | 92.9% | 80 |
Frequently asked questions
What is the current water level of Saguaro Lake?
As of August 2, 2026, Saguaro Lake is at 94.5% of its capacity, holding approximately 81 hm³ of water, according to SRP (Salt River Project) data.
Is Saguaro Lake reservoir full?
No. As of August 2, 2026, Saguaro Lake is high at 94.5% of its capacity, so it is not full.
Is the water level at Saguaro Lake rising or falling?
The level at Saguaro Lake has been broadly stable over the latest week on record (+0.7 points).
How much water can Saguaro Lake hold?
Saguaro Lake has a total capacity of 86 hm³.
Where is Saguaro Lake reservoir located?
Saguaro Lake is located in Arizona, United States, within the Salt River basin (coordinates 33.566°N, 111.536°W).
What is Saguaro Lake used for?
Saguaro Lake is used primarily for multiple purposes, and is managed by SRP.