Cooling Towers and Legionella



NYS Department of Health Cooling Tower Legionella Regulation (effective 7/6/16)

Registering Cooling Towers with NYS Department of Health:

New York City Cooling Towers 

OCF Cooling Tower Aids: 

OCF Draft Cooling Tower Maintenance Program and Plan Template
Updated draft is available, please contact Barbara Boyle

OCF NYS Cooling Tower Reference Finders


 EPA Draft- Technologies for Legionella Control: Scientific Literature Review, EPA 815-D-15-001

ANSI/ASHRAE Standard 188-2018 Legionellosis: Risk Management for Building Water Systems

ASHRAE Standard 188 establishes minimum legionellosis risk management requirements for building water systems. Included in this publication are: description of environmental conditions that promote the growth of Legionella and informative annexes and an informative bibliography that contain suggestions, recommendations, and references to additional guidance In addition, content throughout the document is revised to bring it in line with current technical standards. Standard 188 is essential for anyone involved in design, construction, installation, commissioning, operation, maintenance, and service of centralized building water systems and components.
The pdf version is available from ASHRAE for $88 at https://www.ashrae.org/technical-resources/bookstore/ansi-ashrae-standard-188-2018-legionellosis-risk-management-for-building-water-systems

 ASHRAE Guideline 12-2000 – Minimizing the Risk of Legionellosis Associated with Building Water Systems

The purpose of this guideline is to provide information and guidance in order to minimize Legionella contamination in building water systems.  It is available for purchase from ASHRAE at https://www.techstreet.com/ashrae/standards/guideline-12-2000-minimizing-the-risk-of-legionellosis-associated-with-building-water-systems?product_id=232891

Cooling Technology Institute (CTI)  WTB-148  Legionellosis.  Guideline:  Best Practices for Control of Legionella

You can obtain this document via http://www.cti.org.  The purpose of this guideline is to provide information and guidance in order to minimize Legionella in evaporative cooling water systems, specifically evaporative condensers, closed-circuit fluid coolers, and cooling towers.

Personnel Treating Cooling Towers

Persons applying pesticides or biocides to cooling towers in NYS must be NYSDEC certified pesticide applicators, category 7G. (http://www.dec.ny.gov/permits/209.html)

CDC Webpages:


Legionella Control In Buildings:

It's Not Just Cooling Towers- ASHRAE 188 Screening

Developing a Water Management Program to Reduce Legionella Growth & Spread in Buildings:  A Practical Guide to Implementing Industry Standards (CDC, June 6, 2016)

Environmental Health & Safety and Emergency Mgmt.