The Pure Water Occasional for September 30, 2016
In this early Fall Occasional, you’ll learn which shower filter makes you sing better, what a developing country cannot be, what is the MCL for potato chips, which countries have water infrastructure superior to that of the US, which famous lake has a bathtub ring, and what was found in the McMillan Reservoir. Meet Kelly Reynolds, Ralph Nader, Joan Rose and Damian Gjiknuri. Hear about microbes, triclocaraban, Chromium 6, biofilm, THMs, HAAs, DPBs, TFMs and Coca Cola. Learn about the 8-year boil water advisory at “Bay of Quinte” Mohawks, the final barrier, the standoff by the Standing Rock Water Protectors, illegal cesspools in HI, toilet reefs in New York, plus the controversy over the Vjosë River. And, as always, there is much, much more.
To read this issue on the Pure Water Gazette’s website, please go here. (Recommended! When you read online you get the added advantage of the Gazette’s sidebar feed of the very latest world water news.)
We’ll start this issue with a perceptive article by an author familiar to the water treatment industry, Dr. Kelly Reynolds of the University of Arizona. Kelly writes frequently on public health issues relating to water and the microbial aspects of water treatment. She is very skillful at presenting technical issues in a way that can be understood by those, like me, who are less technically prepared. The article below challenges our misconceptions about the superiority of US public water delivery infrastructure as compared with that of many other countries. — Gene Franks.
Eliminating Chlorine Residuals from Tap Water
By Kelly A. Reynolds, MSPH, PhD
Drinking water from the tap is not sterile but is regulated to a level of acceptable risk so that infections from microbial exposures and illnesses from chemicals occur at very low levels. In the US, acceptable risk goals are set at one infection per 10,000 persons per year for microbes and as low as one in a million cases of cancer from chemicals, including added disinfectants. The question is how to ensure the safety of drinking water considering that common water treatment protocols inherently create additional health risks. Recent studies compare differences among various countries in water quality management, while exploring whether or not carcinogenic chlorine residuals can be safely excluded from municipal tap water supplies. (more…)