Case Study: How 24/7 Remote Cooling Tower Monitoring Controlled Legionella Risk

Metro Group’s 24/7 remote monitoring technology, included at no additional cost for all cooling tower water treatment clients, is designed to catch the problems building owners cannot see. A recent incident shows exactly how powerful that protection can be.

One client experienced a sudden and significant drop in cooling tower conductivity. Thanks to Metro Group’s 24/7 remote monitoring platform, the system detected the issue within minutes and sent an immediate alert to the Metro Group service team.

A technician arrived right away and uncovered the real cause, a major leak hidden inside a concealed condenser water elbow. The leak was completely invisible from the exterior and would not have been detected during a routine visit.

Metro Group’s 24/7 monitoring system caught the problem instantly:

  • Biocide levels were restored quickly
  • Corrosion protection returned to normal
  • Bacteria growth was inhibited
  • A potential Legionella event was prevented
  • Equipment damage and excess water loss were avoided

Without continuous monitoring, the leak could have gone unnoticed for days. That would have created ideal conditions for Legionella growth, accelerated corrosion, higher water bills, and significant liability for the building owner.

Why Continuous Cooling Tower Monitoring Is Critical for Legionella Control

Cooling tower water chemistry can shift rapidly, even in well maintained systems. Factors that trigger sudden changes include:

  • Changes in system load
  • Shifts in weather
  • Variations in water supply quality
  • Biofilm development
  • Mechanical problems
  • Emerging leaks

Manual testing cannot keep pace with these fluctuations. By the time a technician notices a change on a scheduled visit, bacteria may already be growing, or corrosion may already be underway. Metro Group’s continuous monitoring closes this gap.


What 24/7 Monitoring Tracks and Why It Matters

Modern cooling tower monitoring systems provide real time visibility into the most important Legionella control and corrosion control indicators, including:

Conductivity – Signals water loss and treatment dilution

Biocide levels – Ensures bacteria, including Legionella, remain controlled

Corrosion inhibitor feed – Protects metal surfaces and extends equipment life

Water loss events – Identifies leaks and dilution problems immediately

When any reading moves outside the safe range, Metro Group receives an instant alert so a technician can respond immediately. Remote monitoring does not replace skilled water treatment professionals.  It empowers them with real time data to prevent small problems from becoming costly failures.

Why Metro Group Provides 24/7 Monitoring at No Additional Cost

Metro Group provides advanced remote monitoring free of charge for all current and future cooling tower water treatment clients. This ensures every customer receives the highest level of protection for:

  • Legionella control
  • Corrosion protection
  • System performance
  • Operational reliability

Real time monitoring protects your building, your equipment, and your occupants. For modern cooling towers, it is a necessity, not an upgrade.

Add Metro Group’s 24/7 remote monitoring to your cooling tower at no cost when you sign a 3‑year service contract.

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