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Pool & Hot Tub Alliance
Pool & Hot Tub Alliance: Analysis and Understanding of Source Water

Learning Objectives

  • Evaluate the different types of source water.
  • Discuss how these sources are managed.
  • Evaluate what effects your source water can have on the operation of your pool.
  • Discuss how to test your pool water and how to overcome some common problems encountered when testing.


Pool openings and the routine filling of swimming pools can be a surprise source of problems for pool service and start-up technicians. Source water composition can impact overall swimming pool chemistry and unexpected changes in source water can have large consequences on pool management strategies. This discussion will include the problems associated with using chlorinated water to fill pools, common problems encountered with fill water, such as high total dissolved solids (TDS) and metal concentration, and information on testing interferences. The panel will discuss how to anticipate, prevent, and/or address many of these challenges with the latest technologies currently available.

Time/ Credits

1 hour


Terry Arko

Independent Contractor Recreational Water at Hasa Chemical
Redmond, WA.

Terry Arko

Terry Arko, Independent Contractor Recreational Water, Hasa Chemical, has more than 30 years’ experience in the swimming pool and spa industry, working in service, repair, retail sales, chemical manufacturing, customer service, sales, and product development. A certified pool operator (CPO) and CPO Instructor through the National Swimming Pool Foundation (PHTA). Arko is currently a Water Specialist for SeaKlear Pool and Spa Products including products that treat cloudy water. As members of the National Drowning Prevention Alliance (NDPA), Terry is passionate about water safety and drowning prevention.

James Egan, Ph. D.

Vice President of Research and Development at LaMotte Company
Chestertown, MD

James Egan, Ph. D.

James W. Egan, Jr. has been Vice President of Research and Development at LaMotte Company, located in Chestertown, Maryland since 2012. He holds Patent # 8,734,734 for Liquid Analysis Cartridge, dated May 27, 2014. From 1990 to 2008, he was the Chief Research and Development Chemist at the company, responsible for the development of new portable reagents, colorimeters, turbidimeters, and spectrophotometers for testing water, soil and air. He coordinated with both internal and external chemists, engineers and product developers. As Director of Research and Development from 2008 to 2012, he directed product development of all test strips, tablets, powder and liquid reagents and meters for LaMotte’s Markets. In addition, he investigated the development of new, unique testing devices and sensors, primarily for the water testing markets. Mr. Egan, Jr. is a voting member of the Pool & Hot Tub Alliance’s (PHTA’s) Recreational Water Quality Committee (RWQC). He received a B.A. degree in chemistry with an ACS-certified program at St. Anselms College in Manchester, New Hampshire and a Ph.D. in inorganic chemistry from West Virginia University in Morgantown, West Virginia.