USGS Measurements of Water Quality in San Francisco Bay (CA), 2016-2021 (ver. 4.0, March 2023)

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 years 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 sampling locations along a 145-km transect from lower South San Francisco Bay to the lower Sacramento River. A map and table of sampling locations are included in this Data Release. The project website contains more details about this research program and data collection. Data on the site are updated monthly and available for download : https://sfbay.wr.usgs.gov/access/wqdata

Cloern, J.E., and Schraga, T.S., 2016, USGS Measurements of Water Quality in San Francisco Bay (CA), 1969-2015 (ver. 3.0 June 2017): U. S. Geological Survey data release, https://doi.org/10.5066/F7TQ5ZPR.
https://www.sciencebase.gov/catalog/item/5841f97ee4b04fc80e518d9f

Schraga, T.S. & Cloern, J.E. Water Quality Measurements in San Francisco Bay by the U.S.Geological Survey, 1969-2015. Scientific Data 4:170098 doi:10.1038/sdata.2017.98 (2017).
https://www.nature.com/articles/sdata201798