Daily water quality data sets of the nine U.S. watersheds

US_daily_WQ_datasets_2.xlsx contains daily water quality (WQ) and discharge data from the nine watersheds in the United States. The data value of -999 means missing observation. The names (USGS station numbers) of nine WQ monitoring sites are Blanchard River (04189000), Cuyahoga River (0428000), Great Miami River (03271500), Honey Creek (04197100), Maumee River (04193500), Muskingum River (03150000), Portage River (04195500), Rock Creek (04197170), and Tiffin River (04185000). Daily WQ data were composed by following the procedure described in the Appendix S1 in Hirsch (2014). The all WQ data river were retrieved from the Heidelberg University's National Center for Water Quality Research site (https://ncwqr.org/monitoring/data) and discharge data were downloaded from the USGS National Water Information System (http://waterdata.usgs.gov/nwis/ or https://doi.org/10.5066/F7P55KJN) in 2020. All the daily discharge data were acquired via the USGS National Water Information System. These data were used to evaluate the performance of the unbiased load estimates and confidence intervals of river loads based on the rating curve method using rejection sampling in the listed article below. To maintain the traceability of the proposed load estimation method and replicability of the results in the article, the authors of the article upload the data used in this repository.