Document Detail


The potential for health risks from intrusion of contaminants into the distribution system from pressure transients.
MedLine Citation:
PMID:  15384268     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The potential for public health risks associated with intrusion of contaminants into water supply distribution systems resulting from transient low or negative pressures is assessed. It is shown that transient pressure events occur in distribution systems; that during these negative pressure events pipeline leaks provide a potential portal for entry of groundwater into treated drinking water; and that faecal indicators and culturable human viruses are present in the soil and water exterior to the distribution system. To date, all observed negative pressure events have been related to power outages or other pump shutdowns. Although there are insufficient data to indicate whether pressure transients are a substantial source of risk to water quality in the distribution system, mitigation techniques can be implemented, principally the maintenance of an effective disinfectant residual throughout the distribution system, leak control, redesign of air relief venting, and more rigorous application of existing engineering standards. Use of high-speed pressure data loggers and surge modelling may have some merit, but more research is needed.
Authors:
Mark W LeChevallier; Richard W Gullick; Mohammad R Karim; Melinda Friedman; James E Funk
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Review    
Journal Detail:
Title:  Journal of water and health     Volume:  1     ISSN:  1477-8920     ISO Abbreviation:  J Water Health     Publication Date:  2003 Mar 
Date Detail:
Created Date:  2004-09-23     Completed Date:  2004-10-15     Revised Date:  2009-09-18    
Medline Journal Info:
Nlm Unique ID:  101185420     Medline TA:  J Water Health     Country:  England    
Other Details:
Languages:  eng     Pagination:  3-14     Citation Subset:  IM    
Affiliation:
American Water, 1025 Laurel Oak Rd, PO Box 1770, Voorhees, NJ 08043, USA. mlecheva@amwater.com
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MeSH Terms
Descriptor/Qualifier:
Corrosion
Environmental Monitoring* / methods
Fresh Water* / chemistry
Humans
Risk Assessment
Risk Factors
United States
Water Pollutants, Chemical / adverse effects*
Water Supply / standards*
Chemical
Reg. No./Substance:
0/Water Pollutants, Chemical

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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