Dissolved iron concentrations over several years in the Brazos River, Texas. Summer concentrations were used.
Objective is to determine if there is a trend over time. Iron has two detection limits, at 3 and 10 ug/L. Used in Chapters 5, 11 and 12 of the NADA book.
data(DFe)Helsel, Dennis R. (2005). Nondectects and Data Analysis; Statistics for censored environmental data. John Wiley and Sons, USA, NJ.