This pilot study was conducted to assess the utility of using a health insurance database for the automated detection of waterborne outbreaks of acute gastroenteritis (AGE). The weekly number of AGE cases for which the patient consulted a doctor (cAGE) was derived from this database for 1,543 towns in three French districts during the 2009–2012 period. The method we used is based on a spatial comparison of incidence rates and of their time trends between the target town and the district. Each municipality was tested, week by week, for the entire study period. Overall, 193 clusters were identified, 10% of the municipalities were involved in at least one cluster and less than 2% in several. We can infer that nationwide more than 1,000 clusters involving 30,000 cases of cAGE each year may be linked to tap water. The clusters discovered with this automated detection system will be reported to local operators for investigation of the situations at highest risk. This method will be compared with others before automated detection is implemented on a national level.
How to Save with Cooling Tower Credits
Cooling towers dissipate heat from recirculating water used to cool chillers, air conditioners, or other process equipment to the ambient air. Heat is rejected to the environment from cooling towers through the process of evaporation. Therefore, by design, cooling towers use significant amounts of water. The thermal efficiency and longevity of the cooling tower and equipment depend on the proper management of recirculated water. Water leaves a cooling tower system in one of four ways: Evaporation: The primary...
Toxicological and Environmental Safety Data - Case Study
IntroductionAGRAGEL is a cross-linked copolymer of acrylic acid and acrylamide partially neutralized as potassium/ ammonium salt. The polymer is in its dry form a granulate and forms a gel-like material upon addition of water or aqueous solutions. Due to the cross-linking it is insoluble in water. Uptake of water is facilitated mainly by the negative carboxylic groups of the polymer and their hydration with water molecules. Complete solubilization is hindered because of the cross-linking of different polymer...
How data and analytics are keeping Philly’s water safe
CH2M assisted Philadelphia to implement a Surveillance and Response System (SRS) demonstration project under the U.S. Environmental Protection Agency’s (EPA’s) Water Security Initiative. CH2M Global Director Smart Cities and Senior Technology Fellow Dr. Avinash S. Patwardhan and Ken Thompson, CH2M Deputy Director Intelligent Water Solutions and Senior Technology Fellow, identify how big data was used in Philadelphia in order to keep water safe. Big data, analytics and city operationsCity operators...
Senix Water Level Sensors Drive Irrigation Automation Project
Australia’s Water Crisis Irrigation management is serious business in Australia especially within the Murray-Darling Basin, a 1,000,000 square kilometer watershed that is home to Australia’s most productive agricultural land. The basin’s 23 rivers have some of the lowest and most variable flows in theworld. A massive system of dams, lakes and canals stores water from mountain snowmelt and seasonal rains and distributes it to farms and communities throughout the growing season. The Murray-Dar...
Water reuse market is all set for dramatic expansion
"Water reuse market is all set for dramatic expansion" - a review by Sahana Singh, Editor, Asian Water, February 2010From a probable solution to a low-value proposition and finally to the current avatar of high-value application, water reuse is all set to revolutionise the urban world. Driven by water scarcity, revulsion for big dam projects and a progressive breakdown of the ‘yuck factor’, water reuse is clearly about to explode in the coming decade.Capturing the trends in the growth of this market...