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Groundwater chemistry in the Lower East Rift Zone and summit of Kilauea Volcano, Hawai'i

February 2, 2021

Chemical and isotopic analyses are reported for water samples collected from water supply wells, a geothermal well in the Puna Geothermal Venture (PGV) power plant, a hot spring in the Puna District, a research well on the summit of Kilauea Volcano (informally called "NSF Well", or "Keller Well "), and a water catchment in the headquarters area of Hawai'i Volcanoes National Park, Hawai'i. These water samples were collected and analyzed as part of research investigations on the potential impact of the 2018 Kilauea lower East Rift Zone and summit eruption on water supplies. The presented data allow for a comparison with data from an investigation carried out prior to the 2018 eruption (Evans and others, 2015 ). Water chemistry analysis of samples from the research well on the summit of Kilauea follows a previous data release and research investigations (Hurwitz and others, 2003; Hurwitz and others, 2019 ; Hurwitz and Anderson, 2019). Most samples were analyzed for dissolved and total major cations and anions, trace metals, and isotopes of hydrogen and oxygen. References Evans, W.C., Bergfeld, D., Sutton, A.J., Lee, R.C., and Lorenson, T.D., 2015, Groundwater chemistry in the vicinity of the Puna Geothermal Venture power plant, Hawai'i, after two decades of production: U.S. Geological Survey Scientific Investigations Report 2015-5139, 26 p., Hurwitz, S., Anderson, K.R., 2019, Temporal Variations in Scrubbing of Magmatic Gases at the Summit of Kilauea Volcano, Hawai'i, Geophysical Research Letters, doi:10.1029/2019GL085904. Hurwitz , S., F. Goff, C.J. Janik, W.C. Evans, D.A. Counce, M.L. Sorey, S.E. Ingebritsen, 2003, Mixing of magmatic volatiles with groundwater and interaction with basalt, on the summit of Kilauea Volcano, Hawaii, Journal of Geophysical Research, 108, 2028, doi:10.1029/2001JB001594. Hurwitz, S., Peek, S., Younger, E.F., and Lee, R.L., 2019, Water level, temperature and chemistry in a deep well on the summit of Kilauea Volcano, Hawai'i: U.S. Geological Survey data release,