World Health Organization Publication : Year 2004 ; Issue 9241546387 Chapter Ap8: Chemical Aspects

By World Health Organization

Book Id: WPLBN0000179373
Format Type: PDF eBook
File Size: 0.3 MB
Reproduction Date: 2005

Title:	World Health Organization Publication : Year 2004 ; Issue 9241546387 Chapter Ap8: Chemical Aspects
Author:	World Health Organization
Volume:
Language:	English
Subject:	Health., Public health, Wellness programs
Collections:	Medical Library Collection, World Health Collection
Historic Publication Date:
Publisher:	World Health Organization


Citation APA MLA Chicago Organization, W. H. (n.d.). World Health Organization Publication : Year 2004 ; Issue 9241546387 Chapter Ap8. Retrieved from http://self.gutenberg.org/

Description
Medical Reference Publication

Excerpt
Most chemicals arising in drinking-water are of health concern only after extended exposure of years, rather than months. The principal exception is nitrate. Typically, changes in water quality occur progressively, except for those substances that are discharged or leach intermittently to flowing surface waters or groundwater supplies from, for example, contaminated landfill sites. In some cases, there are groups of chemicals that arise from related sources – for example, the DBPs – and it may not be necessary to set standards for all of the substances for which there are guideline values. If chlorination is practised, the THMs, of which chloroform is the major component, are likely to be the main DBPs, together with the chlorinated acetic acids in some instances. In some cases, control of chloroform levels and, where appropriate, trichloroacetic acid levels will also provide an adequate measure of control over other chlorination by-products.

Table of Contents
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