Reservoir · Arizona · United States · USGS NWIS
Saguaro Lake
92.4% full
Capacity
86.05 hm³
Volume stored
80 hm³
Coordinates
33.566°N, 111.536°W
Last updated
2026-09-16
Current fill
92.4%vs 7 days ago
+0.4%gaining
vs 1 year ago
-1.4%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: 2026-09-16.
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 September 16, 2026, Saguaro Lake is filled to 92.4% of its total capacity, holding roughly 80 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 (+0.4 pts), and it is 1.4 points below its level on the same date a year earlier.
Across the readings we hold for Saguaro Lake — 1142 data points between August 2, 2023 and September 16, 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
- 92.4%
- Water stored
- 80 hm³
- Total capacity
- 86 hm³
- 7-day change
- ▲ 0.4 pts
- Year-on-year
- ▼ 1.4 pts
- Primary use
- Multipurpose
- River
- Salt River
- River basin
- Salt River
- Operator
- SRP
- Coordinates
- 33.566°N, 111.536°W
- Last updated
- September 16, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 16 Sep 2026 | 92.4% | 80 |
| 15 Sep 2026 | 95.0% | 82 |
| 14 Sep 2026 | 92.3% | 79 |
| 13 Sep 2026 | 95.4% | 82 |
| 12 Sep 2026 | 93.9% | 81 |
| 11 Sep 2026 | 93.1% | 80 |
| 10 Sep 2026 | 92.1% | 79 |
| 9 Sep 2026 | 92.0% | 79 |
| 8 Sep 2026 | 91.7% | 79 |
| 7 Sep 2026 | 94.5% | 81 |
| 6 Sep 2026 | 92.9% | 80 |
| 5 Sep 2026 | 93.1% | 80 |