Retrieval Functions for USGS and EPA Hydrology and Water Quality Data R package dataRetrieval version 2.7.24 CRAN Task View: Hydrology (https://CRAN.R-project.org/view=Hydrology) Collection of functions to help retrieve U.S. Geological Survey and U.S. Environmental Protection Agency water quality and hydrology data from web services. Software Depends: R (>= 4.1.0) Imports: curl (>= 7.0.0), lubridate (>= 1.5.0), stats, utils, xml2, readr (>= 1.4.0), jsonlite, httr2, whisker, sf, data.table, rlang Suggests: covr, dplyr, knitr, rmarkdown, testthat Laura DeCicco <ldecicco@usgs.gov> Comprehensive R Archive Network (CRAN) Laura DeCicco [aut, cre] (ORCID: <https://orcid.org/0000-0002-3915-9487>), Robert Hirsch [aut] (ORCID: <https://orcid.org/0000-0002-4534-075X>), David Lorenz [aut], Jordan Read [ctb], Jordan Walker [ctb], Lindsay Platt [ctb], David Watkins [aut] (ORCID: <https://orcid.org/0000-0002-7544-0700>), David Blodgett [aut] (ORCID: <https://orcid.org/0000-0001-9489-1710>), Mike Johnson [aut] (ORCID: <https://orcid.org/0000-0002-5288-8350>), Aliesha Krall [ctb] (ORCID: <https://orcid.org/0000-0003-2521-5043>), Lee Stanish [ctb] (ORCID: <https://orcid.org/0000-0002-9775-6861>), Joseph Zemmels [aut] (ORCID: <https://orcid.org/0009-0008-1463-6313>), Elise Hinman [aut] (ORCID: <https://orcid.org/0000-0001-5396-1583>), Michael Mahoney [ctb] (ORCID: <https://orcid.org/0000-0003-2402-304X>) CC0 2026-03-31 application/tgz https://CRAN.R-project.org/package=dataRetrieval doi:10.32614/CRAN.package.dataRetrieval