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USGS 374938122251801 SAN FRANCISCO BAY A NE SHORE ALCATRAZ ISLAND CA

PROVISIONAL DATA SUBJECT TO REVISION

This station managed by the Sacramento Projects Office.

Available Parameters Available Period
  
2003-11-06  2025-11-03
2003-11-06  2025-11-03
2023-08-07  2025-11-03
2023-08-07  2025-11-03
2023-08-07  2025-11-03
2010-10-01  2023-01-12
2021-10-13  2025-11-03
2022-11-03  2025-11-03
2007-10-01  2025-11-03
2010-10-01  2019-09-13







 (7)
 
  -- or --

 

 
Summary of all available data for this site
Instantaneous-data availability statement

Temperature, water, degrees Celsius
Most recent instantaneous value: 15.3 11-03-2025   23:00 PST
Graph of Temperature, water, degrees Celsius

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Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius
Most recent instantaneous value: 47800 11-03-2025   23:00 PST
Graph of Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius

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Dissolved oxygen, water, unfiltered, milligrams per liter
Most recent instantaneous value: 6.6 11-03-2025   23:00 PST
Graph of Dissolved oxygen, water, unfiltered, milligrams per liter

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Dissolved oxygen, water, unfiltered, percent of saturation, [(2)]
Most recent instantaneous value: 79 11-03-2025   23:00 PST
Graph of Dissolved oxygen, water, unfiltered, percent of saturation, [(2)]

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Chlorophyll fluorescence (fChl), water, in situ, concentration estimated from reference material, micrograms per liter as chlorophyll
Most recent instantaneous value: 1.9 11-03-2025   23:00 PST
Graph of Chlorophyll fluorescence (fChl), water, in situ, concentration estimated from reference material, micrograms per liter as chlorophyll

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Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)
Most recent instantaneous value: 11.4 11-03-2025   23:00 PST
Graph of Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)

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Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU), [(2)]
 
-- Data temporarily unavailable for the time period specified --

Suspended sediment concentration, water, unfiltered, at a fixed point in stream, estimated by a regression equation with turbidity, milligrams per liter
Most recent instantaneous value: 27.6 11-03-2025   23:00 PST
Graph of Suspended sediment concentration, water, unfiltered, at a fixed point in stream, estimated by a regression equation with turbidity, milligrams per liter

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Salinity, water, unfiltered, practical salinity units at 25 degrees Celsius
Most recent instantaneous value: 31 11-03-2025   23:00 PST
Graph of Salinity, water, unfiltered, practical salinity units at 25 degrees Celsius

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Suspended sediment concentration, water, unfiltered, estimated by regression equation, milligrams per liter
 
-- Data temporarily unavailable for the time period specified --