Dissolved arsenic concentrations in ground water of U.S.
This dataset is a random selection of dissolved arsenic analyses taken during the U.S. Geological Survey's National Water Quality Assessment program (NAWQA).
data(NADA.As)
A list containing 50 observations with items ‘obs’ and ‘censored’. ‘obs’ is a numeric vector of all arsenic observations (both censored and uncensored). ‘censored’ is a logical vector indicating where an element of ‘obs’ is censored (a less-than value).
U.S. Geological Survey National Water Quality Assessment Data Warehouse
The USGS NAWQA site at http://water.usgs.gov/nawqa
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