Drinking Water Disinfection [Case Studies White Paper]

  1. Salt Lake City Public Utilities ‐ Award Winning Big Cottonwood WTP, Experiences Microclor® On‐Site Hypochlorite System Reliability and Safety For Over Six Years
    7/18/2018

    Located at the mouth of the Big Cottonwood Canyon, the Big Cottonwood WTP is one of three water treatment facilities providing treated water to Salt Lake City (SLC), Utah. The utility distributes water through about 1,300 miles of transmission and distribution pipe to over 90,500 connections. Recently, the Big Cottonwood WTP was recognized for delivering 16 years of high quality water and received the Directors Award from the EPA & AWWA Partnership for Safe Water.

  2. Indiana American Water Eliminates Gaseous Chlorine At Hidden Lake WTP In Warsaw, Indiana
    7/20/2018

    In 2000, Indiana American Water, a subsidiary of American Water Company, purchased the Warsaw Indiana system which serves a population of over 16,000. Indiana American then completed a Comprehensive Planning Study that included a number of upgrades and improvements to enhance the reliability, safety and water quality of the system.

  3. UVC LEDs For Biofilm Prevention
    8/4/2015

    Biofilm has adverse effects on all types of instruments, sensors, and equipment used in power plants, food and beverage production plants, desalination facilities, paper mills, and marine environments. This includes growth on pipelines, tanks, heat exchangers, reverse osmosis (RO) membranes, and other equipment. Biofilms can cause reduction of heat transfer, increased pressure drop and corrosion of metallic surfaces, and many forms of contamination. 

  4. EBMUD Successfully Manages Chloramine Residual In 10-Million-Gallon Reservoir With Chloramine Management System
    5/23/2016

    Located on the eastern side of the San Francisco Bay, the East Bay Municipal Utility District (EBMUD) treats and distributes water to over 1.3 million customers in Alameda and Contra Costa counties. As one of the largest utility districts in California, EBMUD is a leader in the water industry’s water quality, conservation, and sustainability efforts.

  5. Residual Control Technology Saves Millions Of Gallons Of Water While Maintaining Consistent Chloramine Residual Levels
    7/18/2018

    Like many cities within the Dallas-Fort Worth metroplex, the City of Coppell experienced water quality challenges at different periods throughout the year. In particular, the City had difficulty maintaining adequate chloramine residuals at the 1.5 MG Southwestern elevated storage tank during the warmer summer months when outdoor watering was restricted to conserve water.

  6. Drinking Water Disinfection – A History And Improved Monitoring Techniques
    7/3/2015

    In many countries we take for granted the availability and reliability of safe drinking water.  A recent trip outside of the US reminded me of this fact when I saw notices in the hotel rooms stating the drinking water met specific standards and was safe to drink however, my friends from the country emphatically warned me to not drink the water.

  7. Upgrading DWTP Operations In Kansas With The QbD1200 TOC Analyzer
    7/26/2017

    For drinking water treatment plants (DWTPs), the EPA’s Disinfection Byproduct Rule (DBP) is a way of life. Unfortunately, for many facilities the equipment and operations haven’t evolved with the regulation mandates, leaving facilities in a tough spot. For a DWTP in Douglas County, KS, its challenges with accurate TOC measurement and testing, along with expensive calibrations and extended downtime with its prior TOC analyzer led it to trialing the Hach QbD1200 TOC Analyzer. Read the full case study to learn more.

  8. Case Study: Newport News Uses Emerson Ozone Instrumentation For Safe, Effective Disinfection
    5/22/2006

    Maintaining the quality of the water supply is the top priority for municipal drinking water treatment plants across the country. Water plants use several treatment processes to ensure water quality and safety, and these treatment steps include disinfection. Traditionally, chlorine is used in both primary and secondary disinfection treatments and has been used since 1908. Some water plants are moving to ozone for primary disinfection. One water utility that is taking this direction is Newport News Waterworks. 

  9. Upgrading From Gas Chlorine To On-Site Hypochlorite Generation To Improve Safety And System Resilience
    9/20/2018

    By replacing gas chlorine with on-site hypochlorite generation, Nashville was able to improve the safety and longevity of its water plants to accommodate the growth of the “Heart of Country Music” far into the future. At a recent water conference, Glen Doss, Treatment Plant Manager stated, “In 2016, the last gas chlorine railcar left to large applause.” 

  10. Multi-Barrier Disinfection Strategy - New York City (Case Study)
    1/15/2014

    New York City is home to more than 8 million people, making it the most populous city in the United States. The majority of New York's drinking water is supplied by the Catskill/Delaware watershed, located approximately 100 miles outside the city. Historically, NYC has not filtered the water from this system, nor did they require any additional barriers to microbial contaminants due to the pristine nature of the watershed.