Cooling Tower Legionella Water Management Inspection Checklist
This checklist supports cooling tower Legionella water management programs per ASHRAE Standard 188 Prevention of Legionellosis Associated with Building Water Systems, CDC Environmental Investigation recommendations, and EPA guidance for cooling water systems. Designed for facility managers and water treatment specialists.
- Industry: Facilities / Building Management
- Frequency: Monthly / Per water treatment schedule
- Estimated Time: 30-40 minutes
- Role: Facility Manager / Water Treatment Specialist
- Total Items: 22
- Compliance: ASHRAE Standard 188-2021 Prevention of Legionellosis, CDC Legionella Environmental Investigation Guidance, EPA Legionella in Building Water Systems Guidance, State Department of Health Cooling Tower Registration Requirements
Water Quality Parameters
Biocide and water chemistry testing.
- Free chlorine or biocide residual within program specification?
- pH within program specification (typically 6.8-7.8)?
- Conductivity / TDS within program limits?
- Bleed-off rate adequate to maintain cycles of concentration?
- Make-up water supply functioning?
Physical System Inspection
Tower structure, fill, and basin inspection.
- Tower basin clean with no visible sediment, biofilm, or debris?
- Fill media intact with no damaged, collapsed, or missing sections?
- Drift eliminators installed and in good condition?
- Water distribution nozzles and spray pattern functioning correctly?
Dead Legs and Stagnant Water
Prevention of stagnant water areas where Legionella can proliferate.
- No stagnant water dead legs or infrequently used sections identified?
- All isolation valves cycled and functional?
- Side stream filtration system operational?
Biological Monitoring
Legionella and heterotrophic bacteria testing.
- Legionella culture sampling completed per water management plan schedule?
- Heterotrophic plate count (HPC) bacteria within acceptable limits?
- Previous test results reviewed and any action levels addressed?
Chemical Treatment Program
Biocide dosing and chemical program compliance.
- Biocide treatment log current?
- Alternating biocide program in use to prevent resistance?
- Adequate chemical supply on site for continuous treatment?
Water Management Plan and Records
Water management plan compliance and documentation.
- Written Water Management Plan (WMP) current and accessible?
- Water management team members identified in WMP?
- Cooling tower registered with state/local health authority (if required)?
- Observations and corrective actions required
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Why Use This Cooling Tower Legionella Water Management Inspection Checklist?
This cooling tower legionella water management inspection checklist helps facilities / building management teams maintain compliance and operational excellence. Designed for facility manager / water treatment specialist professionals, this checklist covers 22 critical inspection points across 6 sections. Recommended frequency: monthly / per water treatment schedule.
Ensures compliance with ASHRAE Standard 188-2021 Prevention of Legionellosis, CDC Legionella Environmental Investigation Guidance, EPA Legionella in Building Water Systems Guidance, State Department of Health Cooling Tower Registration Requirements. Regulatory-aligned for audit readiness and inspection documentation.
Frequently Asked Questions
What does the Cooling Tower Legionella Water Management Inspection Checklist cover?
This checklist covers 22 inspection items across 6 sections: Water Quality Parameters, Physical System Inspection, Dead Legs and Stagnant Water, Biological Monitoring, Chemical Treatment Program, Water Management Plan and Records. It is designed for facilities / building management operations and compliance.
How often should this checklist be completed?
This checklist should be completed monthly / per water treatment schedule. Each completion takes approximately 30-40 minutes.
Who should use this Cooling Tower Legionella Water Management Inspection Checklist?
This checklist is designed for Facility Manager / Water Treatment Specialist professionals in the facilities / building management industry. It can be used for self-assessments, team audits, and regulatory compliance documentation.
Can I download this checklist as a PDF?
Yes, this checklist is available as a free PDF download. You can also use it digitally in the POPProbe mobile app for real-time data capture, photo documentation, and automatic reporting.