Reservoir Report

San Pablo reservoir

California, USA USBR
Today high
--
Tonight low
--
Current storage
29,040acre-ft
% of normal
-10%
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Right now · current storage
San Pablo
USBR · SPB
29,040 acre-ft
As of 2026-05-11
Seasonal avg
32,430
Record max
38,530
24h change
-0.2%
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San Pablo -- None reservoir
San Pablo None
About this reservoir

San Pablo

San Pablo is a city located in Contra Costa County, California. The region has a rich history, with the Ohlone people being the original inhabitants. The area was later colonized by the Spanish, and the Mexican government granted land to the San Pablo Rancho. The city is situated in a hydrological basin and gets its water supply from the San Pablo Reservoir. The reservoir is also a popular recreational spot for fishing, hiking, and horseback riding. The city's water system is managed by the East Bay Municipal Utility District. The area has a Mediterranean climate with mild winters and warm summers. The region receives about 25 inches of annual rainfall and relies heavily on snowpack from the Sierra Nevada Mountains for its water supply. The primary agricultural products in the area are walnuts, grapes, and apricots. The San Pablo Bay is a vital habitat for various aquatic species and is used for recreational activities like boating and fishing.

StateNone
OperatorUSBR
Site IDSPB
Percent of normal-10%
Last updated2026-05-11
Records since2021
Storage trends

Daily levels at San Pablo

Storage volume, pool elevation, and total release plotted from the operating agency's daily observations.

Storage

acre-ft · code 2

Pool Elevation

ft · code 1

Detailed forecast

Plan around the weather

Same NOAA / yr.no feed Snoflo's iOS app uses. Watch the precipitation column on the meteogram -- rain on the basin upstream typically lifts inflow 24-72 hours later.

Hourly detail

Next 5 days, hour by hour

Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.

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Deep dive

5-day forecast table

Every 3 hours, broken out across temperature, snow, rain, humidity, and wind. Each cell is colour-coded relative to the column min/max.

TimeConditionTemp (°F)Snow (in)Rain (in)Humidity (%)Wind (mps)Wind dir
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Long-term outlook

15-day temperature & precipitation

Daily temperatures, snow, and rain projected over the next two weeks.

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Regional inflow

Nearby streamflow gauges

USGS streamgauges around San Pablo -- inflows here typically show up in storage 24-72 hours later.

Track San Pablo in the Snoflo app

Save this reservoir as a favorite and set push alerts when storage crosses a threshold (e.g. "alert me at 80% of normal").

FAQ

About San Pablo

Where does the data for San Pablo come from?

Daily storage, pool elevation, and release rates are sourced from USGS, USBR, and USACE monitoring stations. Weather forecast comes from NOAA / yr.no -- the same feed Snoflo's iOS app uses.

How often is the report updated?

Storage observations are updated daily by the operating agency. The 15-day weather forecast refreshes throughout the day. Snoflo caches and renders the most recent observation -- check the "as of" timestamp on the storage card.

What does the Hazard hazard rating mean?

The Corps of Engineers' hazard potential classification grades probable consequences if the dam fails: High = probable loss of human life; Significant = no probable loss of human life but possible economic loss / environmental damage; Low = no probable loss of human life, only minor economic / environmental losses. See the Dam Data Reference card above for the full definitions.

What's "% of normal"?

The current storage value compared to the historical average storage on this calendar day. 100% = right on average; values above 100% mean above-normal storage (wet year); values below mean below-normal (dry year or drought).

Can I get alerts when storage crosses a threshold?

Yes -- alerts are managed in the Snoflo iOS app. Favorite this reservoir, set a threshold, and you'll get a push the moment conditions cross.

More reservoirs

Other water bodies near here

Snoflo-tracked reservoirs and dams within driving distance of San Pablo.

Premium feature

Favorites and alerts are part of Snoflo Premium. Save reservoirs, set storage thresholds, and get push notifications when conditions cross.

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Manage alerts in the Snoflo app

Custom alerts are configured in the iOS app -- favorite this reservoir, set a threshold, and you'll get a push the moment conditions cross.

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