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Posts Tagged ‘municipal water’

Enhanced Monitoring for Hexavalent Chromium in Drinking Water

Thursday, January 20th, 2011

Hexavalent Chromium in Drinking WaterIn response to a draft scientific review released in September 2010, the EPA has issued guidance to all public water systems (PWS) recommending enhanced monitoring and sampling programs specifically for hexavalent chromium [also known as chromium-6 or Cr(VI)] in drinking water.

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New Disinfectants Rule Deadlines for Public Water Systems

Wednesday, March 10th, 2010

Public Water Systems
This article describes the background, stages and the new deadlines for public water systems to comply with the most current disinfectants and disinfection byproducts rule.

By Dr. Harlan H. Bengtson, PE

 

 

Background on Disinfection and Disinfection Byproducts

Jersey City, NJ was the first U.S. city to routinely disinfect its municipal water supply, starting in 1908.1 Soon after, thousands of cities and towns across the country began to do the same and this dramatically decreased the prevalence of waterborne diseases such as cholera and typhoid. To demonstrate, the incidence rate of typhoid fever in the U.S. dropped from about 100 cases per 100,000 people in 1900 to 33.8 cases per 100,000 people in 1920.2 By 2006, this rate had dropped to 0.1 cases per 100,000 people.3

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