Concentrations of organic and inorganic constituents in tapwater samples from California in 2020-21 (ver. 3.1, March 2024)
Dates
Publication Date
2021-09-29
Start Date
2020-11-15
End Date
2021-06-28
Revision
2022-02-01
Revision
2022-10-07
Last Revision
2024-03-28
Citation
Romanok, K.M., Smalling, K.L., Bradley, P.M., McCleskey, B.R., Hladik, M.L., Gray, J.L., and Kanagy, L.K., 2021, Concentrations of organic and inorganic constituents in tapwater samples from California in 2020-21 (ver. 3.1, March 2024): U.S. Geological Survey data release, https://doi.org/10.5066/P9X3XLK3.
Summary
This dataset contains the trace elements, cations, anions, disinfection by-products, per- and polyfluoroalkyl substances (PFAS), pharmaceutical and pesticide concentration results for the tapwater study conducted in California, November, 2020 through May, 2021. Trace elements, cations and anions were analyzed at the U.S. Geological Survey Redox Chemistry Laboratory in Boulder, Colorado. The disinfection by-product compounds were analyzed at the U.S. Geological Survey Organic Chemistry Research Laboratory in Sacramento, California. Concentration results for PFAS, as well as surrogate percent recovery information, were analyzed at the National Water Quality Laboratory (NWQL) in Denver, Colorado, and were added in version 2.0. Concentration [...]
Summary
This dataset contains the trace elements, cations, anions, disinfection by-products, per- and polyfluoroalkyl substances (PFAS), pharmaceutical and pesticide concentration results for the tapwater study conducted in California, November, 2020 through May, 2021. Trace elements, cations and anions were analyzed at the U.S. Geological Survey Redox Chemistry Laboratory in Boulder, Colorado. The disinfection by-product compounds were analyzed at the U.S. Geological Survey Organic Chemistry Research Laboratory in Sacramento, California. Concentration results for PFAS, as well as surrogate percent recovery information, were analyzed at the National Water Quality Laboratory (NWQL) in Denver, Colorado, and were added in version 2.0. Concentration results for pharmaceutical and pesticide compounds, analyzed at the NWQL, were added in version 3.0. Version 3.1 corrects a single barium value from 710 micrograms per liter (ug/L) to 71.0 ug/L, at site TW2020 CABRG 034.
Data were obtained to provide a "snapshot" of potential chemical contaminants an individual may be exposed to from typical residential tap water. Samples were collected by citizen-scientists, following a supplied plain-language, sample-collection protocol derived from OFR 2018-1098 (Methods used for the collection and analysis of chemical and biological data for the Tapwater Exposure Study, United States, 2016–17; https://doi.org/10.3133/ofr20181098) and shipped to the U.S. Geological Survey Laboratories. Samples were not collected following EPA compliance protocols and are not appropriate to be compared to regulatory guidelines and action levels.
