20
Feb
2015
Treatment

Drinking Water and Chlorine Smell


06
Feb
2015
Treatment
by Joan B. Rose, PhD

UV Irradiation and Its “Sleeping Beauty Effect” on Bacteria

Until the late 1970’s, chlorine was virtually the only disinfectant used to treat drinking water, thanks to a number of desirable attributes including its effectiveness against most known pathogens, residual protection, operational reliability and cost. New challenges in the past several decades, however, including the identification of chlorine-resistant parasites Giardia and Cryptosporidium, disinfection byproducts, and... Read More »

24
Oct
2014
Treatment
by Bruce K. Bernard, PhD

Chlorinating Brainerd’s Drinking Water Can Save Lives

There’s a controversy brewing in the Mississippi River city of Brainerd, Minnesota that is about to boil over.  On October 28, the Brainerd Public Utilities Commission will debate whether or not to chlorinate the city’s drinking water on a permanent basis.  The question for many in the municipality of nearly 14,000 is whether disinfecting is worth... Read More »

28
Oct
2013
Treatment
by Fred Reiff, PE

Battling Biofilms in Aging Water Infrastructure

Microbes’ propensity to attach to both living and inanimate surfaces improves their likelihood of survival and proliferation.  They produce a sticky material that binds them together and anchors them to the surface forming dense, complex colonies of microorganisms known as biofilm.  Biofilms are very common in nature1, especially on water- and food-contact surfaces.  The interiors... Read More »

20
Sep
2013
Treatment
by Water Quality & Health Council

US Drinking Water Chlorination Turns 105!

From a list of notable events of 1908, one is likely to learn that:  Explorer Robert Peary set sail from New York Harbor on an epic journey to reach the North Pole;  a large meteorite blasted into Earth’s atmosphere over Siberia causing an explosion that leveled 800 square kilometers of forest; the first Model T... Read More »

16
Aug
2013
Treatment
by Water Quality & Health Council

Water Treatment Fundamentals

US drinking water is generally assumed to be safe and healthful.  Of those Americans served by municipal water systems, 70 percent derive their water from surface water sources, e.g., rivers, lakes and reservoirs, after it is ushered through a series of critical treatment steps. The remaining 30 percent are served by municipal groundwater systems that... Read More »

05
Apr
2013
Pool Maintenance
by Chris Wiant, MPH, PhD

The Chlorine Residual: A Public Health Safeguard

Chlorine and chlorine-based disinfectants are used worldwide to destroy germs in drinking water and swimming pools. One of the reasons for the widespread use of chlorine disinfectants is that they provide a “residual” level of protection against waterborne pathogens. A chlorine residual is a low level of chlorine remaining in water after its initial application.... Read More »

08
Mar
2013
Treatment
by Stephen A. Hubbs, PE

The Truth about Disinfection By-products in Drinking Water

Over the past few years, concerns have been expressed about US drinking water quality and source water protection. Many of these concerns are raised without context or perspective and may leave people with a distorted view of the overall role of disinfection and disinfection by-products (DBPs) in public health. DBPs are unwanted substances in drinking... Read More »