Arsenic {NADA}R Documentation

Dissolved arsenic concentrations in ground water of U.S.

Description

This dataset is a random selection of dissolved arsenic analyses taken during the U.S. Geological Survey's National Water Quality Assessment program (NAWQA).

Usage

    data(Arsenic)

Format

A list containing 50 observations with items `As', `AsCen', `Aquifer'. `As' is a numeric vector of all arsenic observations (both censored and uncensored). `AsCen' is a logical vector indicating where an element of `As' is censored (a less-than value). `Aquifer' is a grouping factor of hypothetical hydrologic sources for the data.

Source

U.S. Geological Survey National Water Quality Assessment Data Warehouse

References

The USGS NAWQA site at http://water.usgs.gov/nawqa


[Package NADA version 1.5-1 Index]