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

Pond A4 (Stage Only) (USGS)

Reading 3.07 ft and 0 cfs. Valley Water publishes no flood threshold for this location.

Pond A4 (Stage Only) (USGS) plotted at latitude 37.4183 and longitude -121.9969 over Valley Water's published major-watershed layer.
Pond A4 (Stage Only) (USGS) at 37.4183, -121.9969, 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

3.07 ft

Captured July 28, 2026 at 4:30 PM PT

  • Sensor ID 5155
  • 37.4183, -121.9969
  • Not a flood watch sensor
  • Reporting

Flood Thresholds

Valley Water publishes no flood thresholds for this sensor. It is monitored for water supply and stream conditions rather than for flood warning.

Sensor Notes

Station is located near the Smart Station Trail on Salt Pond A4. Data collection began March 1, 2024. <br /> <br /> USGS collecting water quality data under site <a href="https://waterdata.usgs.gov/nwis/uv?site_no=372507121594801">#372507121594801</a>

Valley Water, sensor notes for Pond A4 (Stage Only) (USGS)