Concentrations for Total Dissolved Solids, Arsenic, Boron, Fluoride, and Nitrite-Nitrate for Wells Sampled in the Mojave Water Agency Management Area, California, 1991-97

Water-Quality

Water-quality samples were collected during 1991-1997. All analyses were done at the U.S. Geological Survey National Water Quality Laboratory using techniques described by Fishman and Friedman (1989). Major anions were determined using liquid chromatography. Major cations were determined using either atomic absorption spectrophotometry or inductively coupled plasma emission spectrophotometry. Trace metals were determined using inductively coupled plasma mass spectrometry. Total dissolved solids were determined by evaporation to constant mass at 180 °C.

Conversion Factors

Temperature in degrees Celcius ( °C) may be be converted to degrees Fahrenheit ( °F)  as follows:

°F=1.8 °C+32

Sea level: In this report ``sea level´´ refers to the National Geodetic Vertical Datum of 1929 (NGVD of 1929)--a geodetic datum derived from a general adjustment of the first-order level nets of both the United States and Canada, formerly called Sea Level Datum of 1929.

Altitude, as used in this report, refers to distance above or below sea level.

Concentrations of chemical constituents in water are given either in milligrams per liter (mg/L) or micrograms per liter (µg/L).

Abbreviations

As                               Arsenic

B                                 Boron

F                                 Fluoride

NO2+NO3                 Nitrite-Nitrate

TDS                            Total Dissolved Solids

--                                 Data Not Available

<                                  Actual value is known to be less than value shown

Acronyms

CalEPA                        California Environmental Protection Agency

USEPA                        US. Environmental Protection Agency

USGS                          United States Geological Survey

Reference Cited

Fishman, M.J., and Friedman, L.C., 1989, Methods for determination
                  of inorganic substances in water and fluvial sediments:
                  U.S. Geological Survey Techniques of Water-Resources
                  Investigations, Book. 5, Ch. A1, 545 p.