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Surface Water Data Portal

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

Watershed

Pajaro

South county drains the other way. Uvas, Llagas and Pacheco creeks run south out of Santa Clara County into the Pajaro River and on to Monterey Bay.

21 stream gauges · 9 rain gauges · 2 reservoirs · drains to Monterey Bay

Pajaro portal-group sensors plotted at their published coordinates over Valley Water's major-watershed polygons.
21 stream, 9 rain, and 2 reservoir sensors assigned to the Pajaro portal group, plotted at their issued coordinates. Llagas, Uvas 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
  • Rain gauge
  • Reservoir
  1. San Francisquito
  2. Adobe
  3. Permanente
  4. Sunnyvale West
  5. Sunnyvale East
  6. Calabazas
  7. San Tomas
  8. Guadalupe River
  9. Coyote
  10. Uvas
  11. Llagas

Reservoirs Above This Watershed

Water released or spilled from these reservoirs arrives at the gauges below.

Reservoirs in the Pajaro watershed
ReservoirStorageElevationSpills at
Chesbro Reservoir3,889 acre-feet506.8 ft525 ft
Uvas Reservoir5,063 acre-feet468.2 ft487.5 ft

Ridge to Bay

Each creek is drawn top to bottom in the order the water runs. The bar beside each gauge is filled to its captured stage on that gauge's own local scale; the dashed rules across it are the flood thresholds Valley Water publishes for that location.

Uvas Creek

6 gauges, ordered north to south down the creek

  1. Uvas Creek at Uvas Road

    4.71 ft · 1.22 cfs · no published threshold

  2. Uvas Creek below Uvas Reservoir

    1.82 ft · 14.14 cfs · no published threshold

  3. Uvas Creek at Heritage Way

    4.66 ft · 14.02 cfs · no published threshold

  4. Uvas Creek below CA-152

    2.31 ft · 8.56 cfs · no published threshold

  5. Uvas Creek at Miller Avenue

    1.12 ft · 2.6 cfs · 2.88 ft below threshold 1

  6. Uvas Creek at W Luchessa Ave

    2.76 ft · 0.15 cfs · 5.24 ft below threshold 1

Llagas Creek

5 gauges, ordered north to south down the creek

  1. Llagas Creek above Chesbro Reservoir

    2.17 ft · 0.19 cfs · no published threshold

  2. Llagas Creek below Chesbro Reservoir

    1.24 ft · 9.83 cfs · no published threshold

  3. Llagas Creek below Lake Silvera

    6.70 ft · 4.54 cfs · no published threshold

  4. Llagas Creek below Santa Teresa Blvd

    3.63 ft · 7.59 cfs · no published threshold

  5. Llagas Creek at Southside Dr (USGS)

    1.16 ft · 12.8 cfs · no published threshold

East Little Llagas

3 gauges, ordered north to south down the creek

  1. East Little Llagas above Sycamore Ave

    1.97 ft · 0 cfs · no published threshold

  2. East Little Llagas below San Martin Ave 5173

    4.98 ft · 0.07 cfs · no published threshold

  3. East Little Llagas at Church Ave

    6.64 ft · 0 cfs · no published threshold

Other Gauges Here

Rain Gauges Here

Rain gauges in the Pajaro watershed
GaugeLast hourLast 24 hoursSeason
Castro Valley0.00 in0.00 in20.59 in
Loma Prieta0.00 in0.00 in41.61 in
Uvas Reservoir0.00 in0.00 in23.98 in
Uvas Canyon County Park0.00 in0.00 in41.30 in
West Little Llagas0.00 in0.00 in18.27 in
Palm Ave0.00 in0.00 in16.61 in
Edmundson Ave0.00 in0.00 in17.80 in
Canada de los Osos0.00 in0.00 in20.43 in
Pacheco Reservoir0.00 in0.00 in18.43 in