Residential Water Quality Report
QUANTITATIVE ANALYSIS FOR HEXAVALENT CHROMIUM AND HEAVY METALS
(20 Pages of Text + 15 Exhibits)
This analysis of a representative residential water sample was conducted in response to public concern related to possible exposure to hexavalent chromium via drinking water, and to the draft regulation recently proposed by the California Department of Health Services that would add hexavalent chromium to the list of unregulated chemicals for which monitoring would be required in vulnerable drinking water sources. This treatise also addresses the issues of adequacy of the current maximum contaminant limit standard for total chromium (50 part per billion) and the necessity of establishing a separate maximum contaminant limit standard for hexavalent chromium.
I. Summary of Findings
A. Summary of Analytical Results
II. Analytical Methods and Results
A. EPA Method 218.6: Determination of Hexavalent Chromium in Drinking Water by Ion Chromatography
B. Determination of Total Chromium in Residential Water By Inductively Coupled Plasma Mass Spectrometry: EPA Method 6020.
C. Determination of Copper (Cu), Iron (Fe), Nickel (Ni), Lead (Pb) by Inductively Coupled Plasma Atomic Emission Spectroscopy (EPA Method 200.7)