In many sterile processing departments, water quality testing follows a familiar rhythm.
Monthly.
Quarterly.
Sometimes even less frequently.
A sample is collected. A report is generated. A requirement is checked off.
And for a moment, there’s confidence.
But here’s the reality:
Water quality doesn’t change on a schedule.
The Limitation of Snapshot Testing
Periodic testing provides a snapshot—a single moment in time.
But sterile processing doesn’t operate in snapshots. It operates continuously.
Between tests, water quality can shift due to:
- Changes in incoming municipal water
- System performance drift
- Filter exhaustion or degradation
- Maintenance inconsistencies
- Variations in demand and usage
These changes don’t wait for the next scheduled sample.
So while results may indicate compliance at one point in time, they don’t guarantee control over time.
And that gap is where risk begins to build.
What ST108 Is Really Asking For
ANSI/AAMI ST108 represents a shift in thinking.
It moves sterile processing departments away from periodic verification and toward ongoing water quality management.
This includes:
- Continuous awareness of system performance
- Identification of trends—not just isolated results
- Early detection of deviations
- Timely and informed corrective action
In other words, ST108 is not asking:
“Did you test your water?”
It’s asking:
“Do you know what your water quality is—consistently—and can you prove it?”
The Risk of What You Can’t See
When monitoring is limited to periodic testing, hospitals are often operating reactively.
By the time a problem is identified:
- Instruments may already show signs of staining or corrosion
- Rework may already be required
- Sterile processing workflows may already be disrupted
- OR schedules may already be affected
This creates avoidable:
- Risk to patient safety
- Cost from inefficiencies and damage
- Operational instability
Because what you don’t see, you can’t manage.
And what you can’t manage, you can’t control.
Why Equipment Alone Isn’t Enough
Installing an RO or DI system is often viewed as the solution to water quality challenges.
But systems don’t manage themselves.
They require:
- Monitoring
- Interpretation
- Adjustment
- Maintenance
This is where many traditional providers fall short.
They deliver equipment—but not the ongoing visibility required to ensure that equipment continues to perform within specification.
Insight from the Field: Experience Matters
This gap between testing and true monitoring is something healthcare organizations are encountering more frequently as they work toward ST108 compliance.
According to Renee Vander Weele, VERDA’s Director of Clinical Services, the issue isn’t a lack of effort—it’s a lack of structure.
“What we’re seeing across hospitals is that teams are doing the right things—they’re testing, they’re documenting—but they often don’t have a system in place to interpret trends or act quickly when something starts to drift. That’s where ST108 is really pushing organizations to evolve.”
With deep experience in sterile processing, infection prevention, and clinical implementation, Renee brings a practical understanding of how water quality impacts real-world operations.
Her perspective reflects a broader truth:
Water quality management isn’t just technical—it’s operational.
From Data to Decision-Making
One of the biggest challenges hospitals face is not collecting data—it’s knowing what to do with it.
Without continuous monitoring and trend analysis:
- Small deviations go unnoticed
- Patterns are missed
- Corrective action is delayed
But with the right level of visibility:
- Issues can be identified early
- Decisions can be made with confidence
- Responses can be proactive instead of reactive
This is where the shift from data collection to data-driven decision-making becomes critical. And let’s face it, this is new – something these departments haven’t been asked to do in the past. It’s a huge step towards improvement but it is evolutionary in its methodology.
The Operational Impact of Continuous Monitoring
When water quality is continuously monitored and actively managed, the benefits extend far beyond compliance.
Reduced Risk
Early detection prevents minor issues from becoming major failures.
Controlled Costs
Fewer surprises mean less rework, fewer damaged instruments, and reduced emergency interventions.
Improved Operational Performance
SPD teams can operate more consistently, with fewer disruptions and greater confidence.
Better Patient Outcomes
Reliable water quality supports reliable instrument reprocessing—and ultimately safer surgical care.
From Hope to Control
Relying on periodic testing alone creates a false sense of security.
It suggests control—but in reality, it often leads to delayed awareness and reactive response.
ST108 challenges hospitals to move beyond that model.
It calls for:
- Continuous visibility
- Defined processes
- Ongoing accountability
Because in sterile processing, consistency matters—and consistency requires control.
The Bottom Line
If you only check your water quality occasionally, you’re not managing it.
You’re reacting to it.
ST108 didn’t introduce a requirement to test more.
It introduced a requirement to understand, monitor, and control water quality over time.
And achieving that requires more than equipment.
It requires expertise, structure, and continuous oversight.
Because in today’s sterile processing environment, water quality isn’t a moment in time.
It’s a condition that must be maintained—every day.