Oahu Bulk Precipitation Major Ions April 2018 to May 2021

Precipitation major ion concentrations from 20 bulk precipitation collectors located across the island of Oahu, Hawaii, USA. Sampling occurred approximately quarterly from April 2018 to May 2021. Samples were analyzed for concentration of major inorganic ions by the Water Resources Research Center laboratory at the University of Hawaiʻi at Mānoa. Sampling was funded by the NSF Hawaiʻi EPSCoR Program through the National Science Foundation’s Research Infrastructure Improvement award (RII) Track-1: ‘Ike Wai: Securing Hawaiʻi’s Water Future Award # OIA-1557349.