Solid Science Practical Solutions


Legionella Risk From Closed Buildings

Open this link for a recent New York Times article featured on Yahoo News highlighting the increasing prevalence of Legionella and the critical importance of taking proactive steps to control the growth and prevent disease in your building(s). 
What You Can Do:
  • Aggressively flush water outlets for at least 30 minutes daily for 1-2 weeks with an emphasis on less frequently used outlets and those with aerators, shower heads, spray faucets, shower heads, decorative fountains, etc.
  • Follow up with water testing for Legionella bacteria to determine if you have a problem.
  • Review building plumbing plans and eliminate dead zones where water can stagnate.
  • Be sure that hot water remains above 125° throughout the distribution system.
  • Have water towers, tanks, etc. regularly cleaned, sanitized and tested.
  • Regularly remove and sanitize (or replace) aerators, showerheads, ice machines, and other outlets associated with aerosolized or stagnant water.
  • Have HVAC systems regularly inspected for evidence of stagnant water, corrosion, and mold which can indicate a high risk for Legionella growth.
  • Most importantly for the long term, establish a comprehensive "Water Management Program" for your building(s). 
How GSE Can Help:   
  1. Design and conduct building survey(s) to identify possible high risk conditions.
  2. Conduct a water testing program for high risk locations. Test results deliver critical data to guide decisions and provide documentation of effective remedial efforts.
  3. Interpret lab test results and develop site-specific remedial action plans if needed.
  4. Oversee system disinfection and other remedial steps via our qualified partners.
  5. Develop a comprehensive water management program for your building's water system in accordance with current CDC, USEPA and other authoritative guidelines.
Useful Links for additional information: