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USGS Measurements of Water Quality in San Francisco Bay (CA), beginning in 2016


Publication Date


Schraga, T.S., Nejad, E.S., Martin, C.A., and Cloern, J.E., 2020, USGS measurements of water quality in San Francisco Bay (CA), beginning in 2016 (ver. 3.0, March 2020): U.S. Geological Survey data release,


The U.S. Geological Survey maintains a program of water-quality studies in San Francisco Bay (CA) that began in 1969. This U.S.G.S. Data Release is a continuation of the previously published 1969-2015 dataset (Cloern and Schraga, 2016; Schraga and Cloern, 2017), it will archive and make available all measurements from 2016 and thereafter. Each year, a data file containing the previous year’s data will be added. Water-quality constituent measurements include salinity, temperature, light attenuation coefficient, and concentrations of chlorophyll-a, dissolved oxygen, suspended particulate matter, and dissolved inorganic nutrients (nitrate, nitrite, ammonium, phosphate and silicate). The sampling is conducted at least monthly at 37 fixed [...]


Attached Files

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“Map of Sampling Stations”
830.77 KB application/pdf
“Table of Station Locations”
1.11 KB text/csv
2016ver.3.0SanFranciscoBayWaterQualityData.csv 360.14 KB text/csv
2017ver.3.0SanFranciscoBayWaterQualityData.csv 390.65 KB text/csv
2018SanFranciscoBayWaterQualityData.csv 433.69 KB text/csv
2019SanFranciscoBayWaterQualityData.csv 393.45 KB text/csv
VersionHistory.txt 1.58 KB text/plain


The dataset was collected to measure spatial and temporal patterns of water-quality variability in San Francisco Bay as a component of long-term research to understand how estuarine-coastal ecosystems change in response to human activities and climate variability.


  • USGS Data Release Products

Associated Items



Version 2.0 by Tara Schraga on June 20, 2018. To review the changes that were made, see “VersionHistory.txt” in the attached files section. Version 3.0 by Tara Schraga on March 30, 2020. To review the changes that were made, see “VersionHistory.txt” in the attached files section.

Additional Information


Type Scheme Key
DOI doi:10.5066/F7D21WGF

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