for sterile processing

Water Testing

Water quality in the clinical environment plays an important role in infection control and regulatory compliance across the healthcare landscape.

Close-up of a hand in a surgical glove reaching for surgical tools on a blue sterile drape in an operating room.

Monitoring and maintaining clinical water helps prevent healthcare-associated infections, meet important standards like ANSI/AAMI ST108, and build trust with patients and staff.

Introducing —Affirm™ Water Tests

BY AGENICS LABS

The Affirm line of water testing solutions brings precision water analysis to healthcare settings, helping facilities meet the routine testing requirements of ANSI/AAMI ST108.

Test kits include all materials needed for sample collection and mailing to the lab. Results provided and stored in complimentary online results portal.

Branding 'Affirm Critical'
Testing kit with tubes, instructions, and package labeled 'AffirmCritical'.

Test kits designed for Critical Water Sources with reporting of endotoxin, bacteria, and other key metrics.

Affirm Utility Branding
Testing kit for utility water, instruction sheet, and purple AffirmUtility pouch.

Test kits designed for Critical Water Sources with reporting of bacteria and other key metrics.

Table comparing AGENICS LABS products AffirmCritical+ and AffirmCritical, which target endotoxin, bacteria, pH, conductivity, hardness, alkalinity, and turbidity; and AffirmUtility+ and AffirmUtility, which target bacteria, pH, conductivity, hardness, alkalinity, and turbidity. The note states all results are provided within five business days of sample receipt.

Water Testing Made Easy

Infographic showing process of collecting and shipping samples: 1. Order your kit, 2. Collect your samples, 3. Send it back, 4. View your results, with descriptive instructions below each step.

The Four Steps to Effective Water Management

Blue circle with a white number 1 in the center.

Assess current water systems and water quality

Blue circle with the white number 2 in the center.

Implement a water management plan incorporating requirements of the standard

Blue circle with white number three in the center.

Validate that new systems meet the water quality requirements

Blue circle with the white number 4 in the center.

Routinely monitor water quality according to the metrics established in the standard

Key Definitions

Critical Water

Critical Water (ST108) is water that meets purity standards for rinsing surgical instruments and medical devices, ensuring patient safety by minimizing organic and inorganic contaminants, microorganisms, and endotoxins.

Utility Water

The initial water coming into a healthcare facility, typically tap water. This water may require additional treatment to meet the quality requirements as outlined in the Standard and can be used for general cleaning tasks such as flushing, washing, and rinsing medical devices.

Water Management Program

A protocol ensuring water quality in medical device processing. An effective program involves a cross-functional team, a risk-based approach, defined roles, verification methods, and documentation standards.

Endotoxins

A toxin present inside a bacterial cell. When a cell dies and disintegrates, the toxin is released and can be responsible for inflammation or some diseases. After bacteria is killed by a water treatment system (such as with UV) the endotoxins must be filtered out. Measured by Endotoxin Unit (EU).

Steam Water

Water that is converted into steam whether from a central steam boiler system or local steam generator for use in medical device sterilization. This water must meet requirements as outlined in the Standard and tested as steam condensate.

Bacteria

A single cell living organism that can cause some diseases. Agenics’ bacteria tests looks specifically for aerobic, heterotrophic bacteria that grows in low nutrient environments, such as water.

Water Quality Standards for Routine Monitoring

For ST108 Compliance

Table showing water quality measurement standards for units, utility, critical, and steam categories, including pH, conductivity, alkalinity, hardness, bacteria, endotoxin, color and turbidity, and testing frequency.

 FAQs

  • The Association for the Advancement of Medical Instrumentation (AAMI) introduced ST108, an evolution of AAMI TIR34, to advance water quality in healthcare settings by establishing clear requirements for the water used in medical device processing. The standard explains proper maintenance of water used in the processing of medical devices, including sterilization, cleaning, rinsing, and disinfecting.  

    • PATIENTS: Reduce patient risk of infection or toxicity exposure response caused by microbial or endotoxin contamination on devices.

    • DEVICES: Improve performance and longevity of equipment by reducing device corrosion, pitting, or scaling of equipment  

    • FACILITIES: Improve water system effectiveness while reducing maintenance costs caused by scaling and build-up 

  • Considered a best practice for patient safety, compliance with ST108 is required by accrediting organizations including The Joint Commission and DNV.

  • Head to AAMI.org and search AAMI ST108:2023 - Water for Processing of Medical Devices

Resources

Critical Submission Form & IFU

Utility Submission Form & IFU

Affirm Sell Sheet

ST108 Overview

“The importance of monitoring water quality to prevent problems with microbial proliferation cannot be overemphasized.”

— Provided courtesy of AAMI