Why Test for Legionella?

Legionella testing is increasingly recognized as an important part of a water management program for both potable and non-potable water systems. New York, ASHRAE, and Centers for Medicare & Medicaid Services mandate or recommend testing to validate the water management program and to monitor its effectiveness.

Why Choose U.S. Micro-Solutions?

  • Accredited by CDC ELITE, New York ELAP, AIHA-LAP LLC
  • Immediate notification of positive results
  • Lab open on Saturdays
  • Gold standard culture method (ISO11731:2017)
  • Rapid identification of Legionella species by MALDI-TOF mass spectrometry
  • Serogrouping of L. pneumophila as serogroup 1 or 2-14
  • Use of selective and non-selective media
  • Direct plating and concentration by filtration
  • Sample pre-treatment with heat and acid
  • Free collection bottles and swabs

Get Started Today

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How It Works


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Order Your Test

Complete the Chain of Custody and ship samples.

We Do Our Work

Our experienced team analyzes the samples.

You Get Results

We immediately notify you of positive results & send a final report within 1-2 business days of analysis completion.

Legionella Testing Information

Water TypeSamples
(Test Code = LEG)
Sample TypeAnalytical Sensitivity (CFU/mL)Turn-Around Time (days)
PotableFaucet, shower head, hot water tank, ice machines/dispensers, drinking fountain, eye washLiquid<1~8 days for final report; preliminary notification of all positive results
NonpotableCooling tower, evaporative condenser, decorative fountain, whirlpool, spa, swimming poolLiquid10
IndustrialMetal working fluidLiquid10

Samples submitted for Legionella may also be analyzed for heterotrophic plate count (HPC).

Test CodeAnalysisSamplesTurn-Around Time (days)
HPCHeterotrophic Plate CountAs Above for Legionella5
IDSLegionella Species IdentificationBCYE slant or plate with suspected Legionella growth2