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    
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.
Mark W LeChevallier; Richard W Gullick; Mohammad R Karim; Melinda Friedman; James E Funk
Related Documents :
12423278 - Late hemodynamic changes following controlled hemorrhage and volume restitution with bl...
1483298 - Pathophysiology of portal hypertension.
2404648 - Thickened stomach--an ultrasound sign of portal hypertension.
11499708 - Ultrasonography of the normal feline pancreas and associated anatomic landmarks: a pros...
7735648 - Deceleration vs. acceleration: a haemodynamic parameter in the assessment of vascular r...
8524498 - Prevalence of micro- and macroalbuminuria and their relationship with other cardiovascu...
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    
American Water, 1025 Laurel Oak Rd, PO Box 1770, Voorhees, NJ 08043, USA.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Environmental Monitoring* / methods
Fresh Water* / chemistry
Risk Assessment
Risk Factors
United States
Water Pollutants, Chemical / adverse effects*
Water Supply / standards*
Reg. No./Substance:
0/Water Pollutants, Chemical

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

Previous Document:  Hip fracture incidence: trends, seasonality and geographic distribution in a Health District in the ...
Next Document:  A novel technology to improve drinking water quality: a microbiological evaluation of in-home floccu...