San Mateo C above Junction Box at Dam1 near Hillsborough

USGS Site No: 11162735 • San Mateo County, CA

San Mateo C above Junction Box at Dam1 near Hillsborough is currently at 0 cfs (Very High — 95th percentile for this date) . Gage height: 0.35 ft.

Reading from

0
CFS Discharge
0.35
Gage Height (ft)
Very High
Flow Condition
N/A
Flood Status

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) 0
75th High threshold 0
95th Very High threshold 0

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.

3 2 0 cfs Apr 5 May 28
10th–95th historical Day-of-year median Recent discharge

30-Day Flow History

Date Discharge (CFS) Gage Ht (ft)
May 28, 2026 0 —
May 27, 2026 0 —
May 26, 2026 0 —
May 25, 2026 0 —
May 24, 2026 0 —
May 23, 2026 0 —
May 22, 2026 0 —
May 21, 2026 0 —
May 20, 2026 0 —
May 19, 2026 1 —
May 18, 2026 1 —
May 17, 2026 1 —
May 16, 2026 1 —
May 15, 2026 1 —
Apr 20, 2026 1 —
Apr 19, 2026 1 —
Apr 18, 2026 1 —
Apr 17, 2026 1 —
Apr 16, 2026 1 —
Apr 15, 2026 1 —
Apr 14, 2026 1 —
Apr 13, 2026 2 —
Apr 12, 2026 2 —
Apr 11, 2026 1 —
Apr 10, 2026 1 —
Apr 9, 2026 1 —
Apr 8, 2026 1 —
Apr 7, 2026 1 —
Apr 6, 2026 1 —
Apr 5, 2026 1 —

Station Information

USGS Site No
11162735
State
CA
County
San Mateo County
Coordinates
37.5570, -122.4183
Drainage Area
2 mi²
Datum (ft)
648.4
HUC Code
18050004
View on USGS NWIS →

Recent Extremes

Max discharge
58 cfs
Jan 6, 2026
Min discharge
0 cfs
Nov 12, 2025

Computed from the local daily-values archive.

Nearby Gauges

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