Legionella Resources

Legionella Information

Legionella is a naturally occurring organism. At Chardon, we offer water treatment services and water management plans to help reduce the risk of the spread of legionella in your commercial system.  We also want to be able to provide you more information on Legionella so that you can make informed decisions.

Below is our curated list of external resources that offer more information on Legionella. If after reading through these resources and our service page you would like to talk to a Chardon representative about our treatment services and our water management plans offerings, please give us a call or fill out our contact form and a representative will be in touch.


Laws on Legionella

  • New York State Department of Health regulations for Legionella in cooling towers and potable water in healthcare facilities.
  • New York City government website; Chapter 8 (Cooling Towers) of Title 24 of the Rules of the City of New York.
  • HSE (Health Safety Executive), U.K. website that provides practical advice and guidance to control the risks from exposure to Legionella in manmade water systems and the U.K. requirements (duties) under regulation.
  • Government of Canada website;  “Legionella in heating, ventilation and air conditioning systems”. Part II, Division III titled “HVAC Systems,” which contains requirements regarding HVAC systems, such as standards, records, operation, inspection, cleaning, testing, maintenance, and investigations.


Guidelines on Legionella

  • ASHRAE (American Society of Heating, Refrigeration and Air-Conditioning Engineers, Inc.) website. ASHRAE Standard 188-2015, “Legionellosis: Risk Management for Building Water Systems” and latest position and guideline papers on Legionellosis.
  • AWT (Association of Water Technologies) website; information about water treatment and Legionella.
  • CDC (The Centers for Disease Control and Prevention) website; links to over 2,500 results for Legionella, including the latest revision of the Model Aquatic Health Code.
  • CTI (Cooling Technology Institute) website, formerly the Cooling Tower Institute; download the latest position papers on Legionella.
  • OHSA website; search and get OSHA Legionnaires’ disease information, including the latest manual (Section III, Chapter 22 Legionella 2019: A Position Statement and Guidance Document 7) on Legionnaires’ disease.


Healthcare Guidelines on Legionella


Additional Resources on Legionella

How We Can Help

We are a commercial water treatment and chemical supplier that offers services in 13 different states throught the Mid-Atlantic and Midwest.  We specialize in treating boiler systems, cooling towers and closed-loop systems in a variety of industries.

If you have additional questions or would like to speak to us about how we can assist in your Legionella concerns, please give us a call or fill out our contact form and a representative will be in touch.