Legionella Testing / Biosafety Training
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Legionella Testing

GTS Legionella Testing Laboratory

How We Operate: GTS Lab Newsletter Archive.

  • Since 1981 we have quantitatively tested thousands of samples for legionella from water-containing mechanical equipment and plumbing lines. Contact us to receive our test agreement, chain of custody form, and sampling instructions for legionella bacteria testing. Turnaround time is usually three business days.  gtslegionellatestinglab.

Why Test for Legionella?

  • Legionella testing validates whether your legionella control procedures are working.

  • NAS Management of Legionella in Water Systems is the best reference.
    National Academies of Sciences, Engineering, and Medicine 2019. Management of
    Legionella in Water Systems. Washington, DC: The National Academies Press.
    https://doi.org/10.17226/25474.

  • There are no federal regulations specifying permissible numbers of legionella in water systems. There are numerous legionella guidelines (a.k.a. standards) in the United States: AIHA, APIC, ASHRAE, AWT, CTI, NSF, CDC, EPA, OSHA, CMS, and VA.

  • Much effort and time can be wasted by simply monitoring physical and chemical parameters of building water systems without routine legionella testing of aerosol-producing warm water-containing sources such as cooling towers, spas, fountains, and hot water holding tanks.

  • When numbers of legionella in a water sample are significant, we suggest decontamination of water systems using industry-standard procedures such as the State of Wisconsin Department of Health Guidelines as modified by the Cooling Technology Institute. AIHA, APHA, ASHRAE, CDC, EPA, NSF International, and OSHA have similar decontamination procedures. 

GTS Legionella Test Method:

  • We use the gold standard quantitative direct fluorescent monoclonal antibody (DFA) test for 14 serogroups of Legionella pneumophila and 15 other Legionella species associated with human disease.

Why We Don't Use the Culture Method:

Legionella DFA

Legionella DFA

CDC Symposium 1978

CDC Symposium 1978

ASM Legionella 1984

ASM Legionella 1984

CDC Legionnaires 1978

CDC Legionnaires 1978

CDC Legionnaires 1979

CDC Legionnaires 1979

Legionella Sources-CDC

Legionella Sources-CDC

Legionella DFA

Legionella DFA