Legionella Lab Analysis
Independent, accredited laboratory analysis for Legionella in potable water, cooling towers, and engineered water systems. Choose the gold-standard culture method, rapid molecular screening, or both — we deliver the result your water management plan can defend.
Why Submit Water Samples for Legionella Analysis?
Legionella bacteria thrive in the warm, low-flow conditions that show up in cooling towers, hot-water distribution systems, decorative fountains, and complex commercial plumbing. Inhalation of contaminated aerosols can cause Legionnaires' disease — a severe and sometimes fatal pneumonia — as well as the milder Pontiac fever, with immunocompromised and elderly populations at the highest risk.
Routine, defensible lab analysis is the foundation of every credible water management program. The data you put in your file is what proves your control measures are working — and what gives your team the information it needs when something changes.
Regulatory Alignment
Result reports formatted for ASHRAE 188, CMS, OSHA TED, GSA PBS, and state-level water management requirements.
Plan Validation
Routine sample analysis confirms that flushing, disinfection, and temperature controls are doing the work your plan promised.
Reputation Protection
An outbreak tied to your facility is a brand-defining event. Periodic analysis is the cheapest insurance against the worst version of that story.
Legionella Lab Analysis Methods
Different programs need different methods. We support the four workflows that cover virtually every Legionella scenario, and we'll help you decide which one — or which pairing — fits your sampling plan.
ISO 11731 Culture
TAT: 7 daysThe internationally recognized gold-standard culture method. Provides quantitative recovery of more than 20 Legionella species, including 16 serogroups of L. pneumophila, with isolates available for follow-up source-tracking work.
Best for
Compliance reporting, baseline characterization, water management plan validation
Strengths
Highest accuracy; widely accepted by regulators and certifying bodies
Trade-offs
Longer turnaround than molecular methods — pair with qPCR when speed matters
CDC Culture
TAT: 7 daysThe CDC reference culture method identifies all Legionella species and serogroups and yields isolates for source-tracking. Required by certain jurisdictions and preferred for outbreak forensics.
Best for
Compliance, baseline characterization, outbreak investigation
Strengths
Full speciation; isolates available for downstream identification
Trade-offs
Same 7-day cadence as ISO 11731 — culture is inherently growth-limited
qPCR
TAT: 1–2 daysQuantitative PCR amplifies Legionella DNA directly from a water sample, returning a result in 24–48 hours. Useful as a fast screen, an outbreak triage tool, or a paired confirmation alongside culture.
Best for
Time-sensitive screening, outbreak triage, post-remediation verification
Strengths
Fast; detects all Legionella species; high sensitivity
Trade-offs
Cannot distinguish viable from non-viable cells; quantifies only serogroup 1 of L. pneumophila
Legiolert
TAT: 7 daysAn IDEXX-developed culture-based method targeted specifically at L. pneumophila — the species responsible for the majority of Legionnaires' cases. Easy to interpret, with a most-probable-number readout.
Best for
Routine plan validation when L. pneumophila is the species of concern
Strengths
Simple result format; minimal interpretation overhead
Trade-offs
Targets L. pneumophila only; non-potable matrices benefit from a second method
Water Systems We Analyze Samples From
Cooling Towers & Evaporative Condensers
Process-water systems that aerosolize warm water are the canonical Legionella source. Routine analysis underpins every credible cooling-tower water management plan.
Potable Hot & Cold Distribution
Building hot-water loops, point-of-use fixtures, and showerheads — the points where occupants are actually exposed.
Decorative Fountains & Misters
Aesthetic and humidification features that aerosolize water deserve the same scrutiny as engineered systems.
Hydrotherapy & Spa Equipment
Therapy pools, whirlpools, and spa systems in healthcare and hospitality settings.
Eyewash & Safety Showers
Low-use safety fixtures are notorious for stagnation — periodic analysis catches problems before they reach an injured employee.
Industrial Process Water
Manufacturing and food-and-beverage processing waters where temperature and aerosolization create exposure pathways.
Industries We Serve
Lab Support for Your Water Management Program
We're a laboratory partner — not a sampler or a certifier. Your team or your contractor collects samples in the field; our analysts handle everything from intake to signed report, and we'll back you up on the interpretation.
- Pre-shipped sampling supplies and chain-of-custody documentation
- Sampling-plan guidance aligned with ASHRAE 188, CMS, and state-level expectations
- Method-pairing advice (e.g., qPCR triage with culture confirmation)
- Genus and species reporting referenced against published action levels
- Quarterly trending and summary reporting for water management files
- Result interpretation calls with your water management team
Outbreak Forensics & Rush Analysis
When you're investigating a suspected case, hours matter. We accept rush submissions, prioritize qPCR for same-week answers, and run paired culture for source-tracking isolates. Our analysts coordinate with your water management team and outside epidemiologists to deliver results in the format your investigation needs.
Call us before you ship — we'll align the method pairing and confirm priority intake.
Submit a Sample or Talk Through Your Plan
Talk with our team about your water management program and we'll recommend the methodology — or method pairing — that fits your matrix, your timeline, and your regulatory context.