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Surface Water Data Portal

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

Demo snapshot · not current conditions

No Santa Clara County creek crosses a flood threshold.

The closest is Berryessa Creek at Old Piedmont Road, sitting 1.10 feet below its first threshold. 118 of 119 stream gauges are reporting.

Readings captured July 28, 2026 at 4:53 PM PT from Valley Water's public sensor feed. Use Valley Water's official portal for current conditions.

Closest published threshold1.10 ft below threshold 1Berryessa Creek at Old Piedmont RoadShown on this gauge's own local scale

A network shaped by place

From the foothill reservoirs to the Bay

The readings below belong to a real landscape, not an abstract dashboard. This aerial view of Calero Reservoir shows one of the ten places where winter rain is held above the valley floor.

Aerial view of Calero Reservoir and the dry foothills south of San Jose
Calero Reservoir, May 2018. Place context, not a live condition image. Photo: Dicklyon / CC BY-SA 4.0.
Valley Water's published watershed polygons from the foothills to San Francisco Bay
Published watershed boundaries and sensor network orientation. The map is a source-backed boundary, not a live flood layer.

Every Gauge in the County

Each bar is one stream gauge, filled to its captured stage and ruled with the flood thresholds Valley Water publishes for that exact location. Every gauge uses its own local scale, so bar heights are meaningful within one gauge and must not be compared as creek depth between stations. The groups and order show how the network runs downstream.

Coyote

28 gauges reporting · drains to San Francisco Bay

Upper Penitencia Creek at Piedmont Rd, 4.24 ftCoyote Ck below Coyote Ranch Rd, -1.90 ftCoyote Creek below Anderson Reservoir, 3.73 ftFisher Ck at Monterey Rd, 1.26 ftCoyote Creek below Coyote Reservoir (USGS), 4.60 ftLas Animas Creek above Anderson Reservoir, 2.46 ftPackwood Creek at Jackson Ranch, 0.53 ftCoyote Creek at Edenvale, 1.11 ftLower Silver Creek at San Antonio Rd, 0.92 ftBerryessa Creek above Calaveras Blvd, 3.97 ftUpper Penitencia Creek Diversion to Mabury Recharge Pond, 0.00 ftThompson Creek at Quimby Rd, 1.62 ftCoyote Creek above Coyote Reservoir (USGS), 3.29 ftCoyote Creek at Madrone (USGS), 2.03 ft

Guadalupe

34 gauges reporting · drains to San Francisco Bay

Calero Creek below Calero Reservoir, 1.39 ftAlmaden-Calero Canal at Calero Reservoir, -0.07 ftAlmaden-Calero Canal at Almaden Reservoir, 0.53 ftAlamitos Creek below Almaden Reservoir, 1.97 ftGuadalupe Creek below Guadalupe Reservoir, 1.48 ftGolf Creek near McAbee Rd, 0.28 ftLos Gatos Creek below CA-9, 2.54 ftRoss Creek at Blossom Hill Rd, 1.08 ftCanoas Creek at Dow, 1.47 ftGuadalupe River above Almaden Expwy, 2.34 ftGuadalupe Creek off Hicks Rd, 1.64 ftKirk Ditch at Headwaters, 2.45 ftAlmaden Inflow, 2.93 ftLos Gatos Creek at Lincoln Ave, 4.95 ft

Lower Peninsula

16 gauges reporting · drains to San Francisco Bay

Permanente Creek above Berry Ave, 1.14 ftStevens Creek above CA-85 near Central Ave, 2.56 ftStevens Creek above I-280, 3.27 ftStevens Creek below Stevens Creek Reservoir, 2.15 ftStevens Creek Inflow, 3.77 ftMatadero Creek at Lambert Ave, 3.14 ftSan Francisquito Creek at Stanford (USGS), 0.20 ftPermanente Creek at Rancho San Antonio Park, 2.18 ftWest Permanente Creek below Dear Hollow Farm, 2.75 ftAdobe Creek at Foothill College, 0.91 ftAdobe Creek d/s El Camino Real, 1.32 ftMcKelvey Park Pump Sensor, 3.78 ftBear Creek at Sand Hill Road (Stanford), 0.00 ftLos Trancos Creek at Arastradero Road, 0.00 ft

West Valley

14 gauges reporting · drains to San Francisco Bay

San Tomas Creek above Williams Rd, 0.51 ftSaratoga Creek at Pruneridge Ave, 0.61 ftCalabazas Creek at Wilcox, 1.11 ftSmith Creek above Elam Ave, 0.92 ftSan Tomas Creek at UPRR near Quito Rd, 2.30 ftWildcat Creek at UPRR near Quito Rd, 0.25 ftCalabazas Creek above Rainbow Ave, 0.98 ftHale Creek near Magdalena Ave, 1.13 ftSunnyvale East Channel at Bayshore Frontage Rd, 1.49 ftSaratoga Creek at Saratoga (USGS), 2.08 ftEl Camino Storm Drain at Willow Ave (Stage Only), 2.01 ftSan Tomas Aquino Creek at Mission College Blvd, 3.98 ftSunnyvale East Channel at Baylands Park (Stage Only), 4.96 ftPond A4 (Stage Only) (USGS), 3.07 ft

Pajaro

21 gauges reporting · drains to Monterey Bay

Uvas Creek at Heritage Way, 4.66 ftUvas Creek at Miller Avenue, 1.12 ftUvas Creek at Uvas Road, 4.71 ftLittle Arthur Creek at Redwood, 1.16 ftLittle Uvas Creek at Uvas Road, 2.37 ftLlagas Creek below Chesbro Reservoir, 1.24 ftBodfish Creek at Whitehurst Rd, 1.15 ftLlagas Creek above Chesbro Reservoir, 2.17 ftPacheco Creek near Dunneville (USGS), 1.53 ftUvas Creek below Uvas Reservoir, 1.82 ftLlagas Creek at Southside Dr (USGS), 1.16 ftUvas Creek at W Luchessa Ave, 2.76 ftArroyo Hondo near San Jose CA (USGS), 2.79 ftWest Little Llagas below Edmundson Ave, 2.97 ft

Reservoir Storage

Ten reservoirs in the foothills catch winter rain before it reaches the valley floor. Anderson, the largest, has been held far below capacity since 2020 under a federal seismic order.

Almaden69%Anderson4%Calero40%Chesbro49%Coyote42%Guadalupe38%Lexington60%Stevens Creek84%Uvas51%Vasona100%

Rainfall

48 rain gauges reported 0.00 in between them in the last 24 hours. Season totals since October:

Season rainfall totals at the five wettest reporting gauges
GaugeWatershedLast 24 hoursSeason to date
Mt UmunhumGuadalupe0.00 in49.53 in
Valley ChristianWest Valley0.00 in42.05 in
Loma PrietaPajaro0.00 in41.61 in
Uvas Canyon County ParkPajaro0.00 in41.30 in
Los TrancosLower Peninsula0.00 in40.87 in

All 48 rain gauges

Is Your Street on the List?

For 32 gauges, Valley Water publishes a written description of exactly what floods at each threshold, naming streets, schools, parks and neighborhoods. This site indexes 148 of those places so you can look yours up directly instead of guessing which sensor applies to you.

Search all 148 named places

What a Storm Looks Like Here

In February 2017 Coyote Creek left its channel in San Jose and about 14,000 residents were ordered to evacuate. An independent review of the response found the sensors had been reading the whole time; the warning was what failed.

Replay February 2017

Get Alerts

Choose the creeks you care about and the threshold that matters to you, and get an email or a text when a gauge crosses it.

Set up alerts