New website by Stoa. Not the official Valley Water website.

Surface Water Data Portal

Demo snapshot · July 28, 2026 at 4:53 PM PT · not current conditions

West Valley watershed

San Tomas Aquino Creek at Mission College Blvd

Reading 3.98 ft and 3.18 cfs. That is 8.02 feet below the first flood threshold.

San Tomas Aquino Creek at Mission College Blvd plotted at latitude 37.3889 and longitude -121.9690 over Valley Water's published major-watershed layer.
San Tomas Aquino Creek at Mission College Blvd at 37.3889, -121.9690, exactly as positioned in Valley Water's sensor feed. Sunnyvale West, Sunnyvale East, Calabazas, San Tomas are the published polygons whose names match this portal group. The eleven published polygons do not exactly match the portal's five sensor groups and do not provide a boundary for every named creek.
  • Stream gauge

3.98 ft

Captured July 28, 2026 at 4:30 PM PT

  • Sensor ID 5122
  • 37.3889, -121.9690
  • Included in Valley Water's flood watch
  • Reporting

What Floods at Each Level

These descriptions are Valley Water's own, quoted exactly as published for this gauge.

Threshold 1 · 12 ft (2,850 cfs)

8.02 ft above the current reading

Flood watch

Valley Water, threshold 1 description for San Tomas Aquino Creek at Mission College Blvd

Threshold 2 · 19.5 ft

15.52 ft above the current reading

Possible overtopping upstream of Agnew Rd

Valley Water, threshold 2 description for San Tomas Aquino Creek at Mission College Blvd

Places This Gauge Covers

Streets and landmarks named in the threshold descriptions above.

Sensor Notes

Sensor is high flow (50cfs+) Record is considered fair to poor due to the lack of discharge measurements coupled with dynamic vegetation growth.

Valley Water, sensor notes for San Tomas Aquino Creek at Mission College Blvd