"Concentrations of OWCs detected in
finished water generally were low and did not exceed Federal drinking-water standards or lifetime health advisories,
although such standards or advisories have not been established for most of these compounds.Also, at least 11 and
as many as 17 OWCs were detected in samples of finished water.Drinking-water criteria currently are based on the
toxicity of individual compounds and not combinations of compounds.Little is known about potential human-health
effects associated with chronic exposure to trace levels of multiple OWCs through routes such as drinking water.The
occurrence in drinking-water supplies of many of the OWCs analyzed for during this study is unregulated and most of these compounds have not been routinely monitored for in the Nationā??s source- or potable-water supplies.This
study provides the first documentation that many of these compounds can survive conventional water-treatment
processes and occur in potable-water supplies."

This was a study done in march of 2004 by several scientists who work for the US Geological Survey (USGS). It indicates that there are interactions we have no clue about. And, that our testing standards suck. I can make a word document of the whole study for you (this is to Kronik and anyone else interested). It is wordy and full of scientific jiberish that probably only a select few understand, but the implications are what drew me in. Chew on this for a bit. The name of the paper is "Persistence of pharmaceutical compounds and other organic
wastewater contaminants in a conventional drinking-watertreatment
plant". Look it up on the net. OWC means organic wastewater contaminants. Peace to all...