Legionella Risk Assessment and Control

Legionellosis or Legionnaires' Disease

Legionnaires' Disease is an emerging and often fatal pneumophila-type illness that high-risk groups, such as the immunocompromised, the elderly, and those with severe lung disease can become infected with.


Legionella bacteria include the species L. pneumophila that can cause Legionellosis.  These species of bacteria occur naturally in soils and bodies of water.  They can, however, inhabit a building’s water systems due to a favorable environment, such as: optimum pH and temperature, scale and sediment buildup, plumbing dead legs, pumps, strainers, and cooling towers where water movement can become stagnant.


GEAR has experienced staff performing legionella risk assessment and abatement. 

Wetland Survey

Outdated Plumbing Systems

As a water supply system ages, there can be valves and pipes that do not flow anymore, creating dead legs legionella bacteria can colonize.

Cooling Tower

Cooling Towers

Water within cooling towers, heated via heat exchange, is an ideal environment for Legionella to grow.

© Gator Engineering & Aquifer Restoration, Inc.

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