A Growing Threat: In a 2015 report, the CDC confirmed an alarming increase in legionella-related disease outbreaks in the U.S., more than half originating in hospitals or healthcare facilities. With no vaccine, and a fatality rate of 28%, this threat must be stopped at the source: the facility water system. According to OSHA, WHO, and the EPA, it is the responsibility of the facility owner or manager to institute and maintain a rigorous water management plan.

We can help with that.

Water System Analysis and Drawings. From the Experts.

Our detailed water system survey, drawings and program development services are the foundation for a water management plan that will help identify and mitigate legionella and other threats to hospitals and healthcare facilities. Strict guidelines, including ASHRAE Standard 188 (American Society of Heating, Refrigerating and Air Conditioning Engineers) and VHA Directive 1061 have established minimum Legionellosis risk management requirements for building water systems. And HydroCorp can help you meet them. Our program is delivered in two phases.



Comprehensive Water System Inventory with
Complete Water Piping Drawings

Expanded Survey of Facility’s Entire Potable
Cold and Hot Water Piping Systems, Including:

  • Hot and cold water supply source evaluation
  • Hot or tempered water supply and return piping
  • Mixing and antiscald valves
  • All system valves and orientation
  • Hammer arrestors
  • Storage tanks/expansion tanks and sizes
  • Recirculating pumps
  • All water using equipment (sinks, showers, spas, ice machines, etc.)
  • Pipe diameter, material, insulation, and label identification
  • Water filters/treatment devices
  • Backflow preventers

Data Collected May Be Used To Mitigate Legionella By Identifying:

  • Potentially hazardous cross connections
  • Dead legs
  • Leaks in piping system
  • Areas subject to low water flow/stagnation
  • Areas of piping system vulnerable to decreased temperatures and/or disinfectant residuals
  • System components requiring replacement or removal
  • Water system points requiring preventative maintenance and monitoring

Digital (CAD) and Physical Drawings:

  • Mapping of entire water system, including all piping, CCPs, backflow prevention devices, dead legs, water usage points and recommendations




Water System Management Plan Report –
Critical Control Point Identification

Executive Summary of Water Supply to Building

  • Includes source evaluation, age of building and water piping system, types of water treatment and water supply network, history of any water-related events, etc.

Critical Control Point (CCP) Inventory

  • Inventory of individual equipment (Critical Control Points, or Water Management Points) that may pose a risk for allowing legionella growth or proliferation. These may include cooling towers, evaporative condensers, domestic hot-water systems, humidifiers, spas and whirlpools, backflow preventers, etc.

Critical Control Point (CCP) Description and Status

  • Description of each individual CCP, and recommendations to address any acute conditions at individual CCPs

Program Recommendations

  • Recommendations for ongoing preventative maintenance and control measures to maintain CCP’s within safe operating and control parameters


Download Water Program Phases

Facility Survey Map

Your Facility Survey Map provides precise details of your potable water system, including all Critical Control Points, systems and fixtures, sampling sites, program recommendations and action items.

SAMPLE: Legionella Facility Survey Map

Legionella: What, Where, and How

Legionella (Legionella pneumophila) is a bacterial pathogen that, in humans, causes a rare and severe form of pneumonia. The infection is water-born – not air-born – and typically enters the lungs via aerosolized water.

In man-made environments, the pathogen can multiply in water sources susceptible to stagnation and contamination, such as central air conditioning systems, cooling towers, evaporative coolers, humidifiers, whirlpool spas, water heating systems, showers, ice machines, and misting systems.

The bacteria attack the immune response system by infecting white blood cells, destroying them, and multiplying. There is no preventive vaccine; treatment is via antibiotics. Hospital-acquired legionella pneumonia has a fatality rate of 28%, and can rise as high as 50% if treatment is delayed by misdiagnosis.

    Download the complete brochure
“Legionella Prevention and Control”
    Download Sample Legionella Survey

Call HydroCorp today at 800.690.6651