Legionella Testing in Montgomery County

ASHRAE (the American Society of Heating, Refrigerating, and Air-Conditioning Engineers) Standard 188, Legionellosis: Risk Management for Building Water Systems identifies the following building-related risk factors associated with Legionellosis:

• Multiple rooms supplied by a centralized hot water heater
• Healthcare facility
• Immunocompromised occupants
• More than 10 stories
• Whirlpools and/or spas
• Aerosol-generating water features or devices such as fountains, evaporative condensers, misters, and/or air washers

The first step in complying with the provisions of ASHRAE Standard 188 is to survey your facility and determine if it meets any of the above-listed risk factors.  If so, you should develop and implement a program to manage the risk of building-related Legionellosis. 

The program incorporates the following seven elements:

1. ​Conduct a hazard analysis
2. Determine the control locations
3. Establish control limits for each control location
4. Set up a system to monitor the control locations
5. Determine the corrective action to be taken when monitoring indicates that a particular control location is not being controlled
6. Establish verification procedures to confirm the effectiveness of the risk-management program
7. Document and maintain records of all procedures and actions