Santa Cruz River at Cortaro, AZ
USGS Site No: 09486500 • Santa Cruz River • Pima County, AZ
Santa Cruz River at Cortaro, AZ on the Santa Cruz River is currently at 50 cfs (High — 81th percentile for this date) . Gage height: 8.40 ft.
Reading from
Historical Percentile Comparison
Today's discharge compared to the long-term record for June 11 at this station. Percentile rank shows what fraction of historical years had lower flow on this date.
| Percentile | Label | CFS Threshold | Today's Flow |
|---|---|---|---|
| 10th | Very Low threshold | 0 | |
| 25th | Low threshold | 0 | |
| 50th (Median) | Normal (median) | 35 | |
| 75th | High threshold | 45 | |
| 95th | Very High threshold | 62 | Today: 50 cfs |
30-Day Hydrograph
Recent discharge plotted against the historical 10th–95th percentile envelope for the same calendar days. Source: USGS daily values + long-term statistics.
30-Day Flow History
| Date | Discharge (CFS) | Gage Ht (ft) |
|---|---|---|
| May 28, 2026 | 37 | — |
| May 27, 2026 | 38 | — |
| May 26, 2026 | 40 | — |
| May 25, 2026 | 39 | — |
| May 24, 2026 | 37 | — |
| May 23, 2026 | 39 | — |
| May 22, 2026 | 39 | — |
| May 21, 2026 | 41 | — |
| May 20, 2026 | 39 | — |
| May 19, 2026 | 39 | — |
| May 18, 2026 | 41 | — |
| May 17, 2026 | 41 | — |
| May 16, 2026 | 41 | — |
| May 15, 2026 | 42 | — |
| Apr 20, 2026 | 41 | — |
| Apr 19, 2026 | 42 | — |
| Apr 18, 2026 | 42 | — |
| Apr 17, 2026 | 41 | — |
| Apr 16, 2026 | 43 | — |
| Apr 15, 2026 | 43 | — |
| Apr 14, 2026 | 40 | — |
| Apr 13, 2026 | 41 | — |
| Apr 12, 2026 | 42 | — |
| Apr 11, 2026 | 41 | — |
| Apr 10, 2026 | 41 | — |
| Apr 9, 2026 | 41 | — |
| Apr 8, 2026 | 41 | — |
| Apr 7, 2026 | 42 | — |
| Apr 6, 2026 | 40 | — |
| Apr 5, 2026 | 39 | — |
Station Information
- USGS Site No
- 09486500
- State
- AZ
- County
- Pima County
- Coordinates
- 32.3507, -111.0959
- Drainage Area
- 3,503 mi²
- Datum (ft)
- 2,123.6
- HUC Code
- 15050302
Flood Stage Thresholds
- Action Stage
- 17.2 ft
- Flood Stage
- 18.5 ft
- Moderate Flood
- 19.5 ft
- Major Flood
- 20.7 ft
Currently 10.10 ft below flood stage.
Recent Extremes
- Max discharge
-
2,150 cfsOct 13, 2025
- Min discharge
-
30 cfsJul 5, 2025
- Days at flood stage
- 0
Computed from the local daily-values archive.
Nearby Gauges
-
Canada Del Oro below Ina Road, Near Tucson, Az.Normal3.3 mi · 0 cfs
-
Rillito Creek at LA Cholla Blvd Near Tucson, Az.Normal5.9 mi · 0 cfs
-
Santa Cruz River at Tucson, AZNormal11.2 mi · 0 cfs
-
Rillito Creek at Dodge Boulevard, at Tucson, AZNormal11.9 mi · 0 cfs
-
Santa Cruz River at Silverlake Road, at Tucson, AZNormal12.2 mi · 0 cfs