Best Practices for Dental Unit Waterlines - Reprinted from July/August 2024 LCDS NEWSLETTER

                                                   

Best Practices for Dental Unit Waterlines

The tragic incident in Anaheim, California in 2016 brought attention to the crucial issue of maintaining dental unit waterlines. This distressing event occurred at a pediatric dental office, where contaminated water was unknowingly used during procedures, including pulpotomies, on young patients. As a result, numerous children suffered from severe infections, leading to the necessity of strong antibiotics, multiple surgeries, excruciating pain, and the potential for facial disfigurement.

Dental unit waterlines (DUWLs) are crucial components in dental care settings, ensuring the delivery of water for various procedures. However, if not properly maintained, they can harbor harmful microorganisms, posing a risk to both patients and staff. Here are some best practices to keep your DUWLs safe and clean.

The Risks

Dental unit waterlines can become breeding grounds for biofilms, thin layers of bacteria that adhere to surfaces. If contaminated water is used during dental procedures, these biofilms can lead to infections. Therefore, regular maintenance and monitoring are essential to prevent microbial contamination.

1.    Waterline Cleaners

Routine use of chemical cleaners (germicides) specifically designed for DUWLs is a key practice. These cleaners help to break down and remove biofilms. Follow the manufacturer’s instructions for the correct dosage and frequency.

2.    Regular Flushing

Daily flushing of waterlines is an effective way to reduce the accumulation of bacteria. It is recommended to flush each waterline for 20-30 seconds between patients and for a longer duration at the beginning and end of each day.

3.    Water Quality Testing

Regular testing of water quality is essential to ensure it meets the safety standards. The American Dental Association (ADA) recommends testing at least once per quarter.  Water used in dental treatment should meet the Environmental Protection Agency (EPA) standards for drinking water, which is less than 500 colony-forming units (CFU) per milliliter of heterotrophic water bacteria.

Testing the water quality at the output of each waterline is crucial. While some dentists assume that ensuring clean water enters the system is sufficient, it's essential to recognize that biofilm frequently develops within the waterline tubing itself.

4.    Use of Sterile Water for Surgical Procedures

For surgical procedures involving the exposure of bone or sterile tissues, use sterile water or saline delivered through devices designed for such procedures. This significantly minimizes the risk of infection.

5.    Installation of Anti-Retraction Devices

Anti-retraction valves or devices prevent the backflow of oral fluids into the waterlines, which can contaminate the water supply. Ensure these devices are installed and functioning correctly on all dental units.  Regular flushing of waterlines is still recommended even when using these devices.

6.    Adherence to Manufacturer’s Instructions

Follow the dental unit manufacturer’s instructions for the maintenance and care of DUWLs. This includes understanding the specific requirements for the use of chemical agents and the recommended maintenance schedule.

7.    Standard Operating Procedures and Staff Training

Establish and follow written standard operating procedures for infection control of dental unit waterlines. Train all dental staff on the importance of maintaining these waterlines and ensure they fully understand the cleaning and testing protocols. Regular training sessions and updates are essential to maintain high standards of waterline hygiene.

8.    Documentation and Monitoring

Keep detailed records of all maintenance activities, including cleaning, flushing, and water testing results. Regular monitoring and documentation help in tracking the effectiveness of your infection control measures and ensure compliance with safety standards.

Conclusion

Maintaining clean and safe dental unit waterlines is critical for patient safety and the overall success of dental practices. By following these best practices, dental professionals can minimize the risk of infection and provide a safe environment for their patients. Regular maintenance, proper training, and adherence to guidelines are the pillars of effective DUWL management.

Implementing these practices not only enhances the quality of care but also ensures compliance with health and safety regulations, protecting both patients and dental healthcare providers.

 

Kelli Ngariki, Owner

Healthcare Compliance Associates

OR-OSHA Requirements or Temporary Workers in Dental Practices by Healthcare Compliance Associates - May 2026 E News

OR-OSHA Requirements or Temporary Workers in Dental Practices

What Oregon Dental Practices Should Know When Bringing in Temporary or Student Workers

Staffing shortages continue to impact dental practices across Oregon.

When someone calls out sick, takes leave, or a position remains unfilled, many practices rely on temporary hygienists, assistants, students, or interns to keep patient care running smoothly.

While this is operationally necessary, it also raises an important compliance question: Are Temporary Workers Covered Under Oregon OSHA?

Yes. Under Oregon OSHA regulations, any worker exposed to workplace hazards — including temporary staff and students — must receive proper safety training.

Your practice is responsible for their safety.

Below is a clear breakdown of what your dental practice must do to remain compliant, safe, and inspection ready.

1. Safety Training for Temporary Workers

Before performing any clinical tasks, workers must be trained in:

• Bloodborne pathogens
• Hazard communication (chemical safety)
• PPE usage
• Infection control
• Emergency procedures

Agencies may provide general training, but site-specific training is still required.

Training should be properly documented and readily accessible in the event of an inspection or if documentation is requested following a complaint against your practice.

2. Bloodborne Pathogens Compliance

Dental settings involve frequent exposure risks.

Because of this, students or temporary workers assisting with procedures must be included under the Bloodborne Pathogens Standard (29 CFR 1910.1030).

Temporary workers must understand:

• Your Exposure Control Plan
• Sharps handling procedures
• What to do after exposure incidents

Not only does this keep you compliant, it also minimizes safety incidents within your practice.

3. Exposure Control Plan Must Include Temporary Staff

Every dental practice should maintain a written Exposure Control Plan that outlines:

• Job roles with potential exposure
• Engineering controls and PPE
• Procedures for exposure incidents

A common compliance issue occurs when the plan only addresses permanent employees.

If students or temporary workers may encounter exposure risks, they should also be considered within the plan.

4. Chemical Safety Training

Under the Hazard Communication Standard, anyone exposed to chemicals must understand:

• What chemicals are used in the office
• Where Safety Data Sheets (SDS) are located
• Labeling and hazard warnings
• Safe handling procedures

This is frequently overlooked when students assist with disinfecting instruments or cleaning surfaces.

5. PPE Use in Dental Practices

Employers are responsible for ensuring all workers know:

• Know what PPE is required for specific tasks
• Understand how to properly wear and remove PPE
• Know where PPE is located within the office
• Consistently follow required PPE procedures

Beyond training, employers are required to actively enforce proper PPE use.

It can be tempting to overlook improper PPE use when someone is only working in the office temporarily. However, this creates unnecessary risk by assuming they will not experience an exposure or injury.

Failure to enforce PPE requirements can also undermine your safety culture. When expectations are applied inconsistently, it can lead to confusion and reduced compliance across the practice.

Consistent enforcement of PPE standards for all workers—regardless of role or duration—is essential to maintaining a safe and compliant environment.

6. Clear Injury Reporting Process

Workers must clearly understand (before a potential incident):

• Who to report incidents to
• Immediate steps after exposure
• Follow-up procedures

Delays or confusion can increase liability.

7. Safety Orientation for Short-Term Workers

Even short-term workers should know the fundamentals of your office’s safety procedures.

This includes:

• Emergency exits and evacuation routes
• Location of eyewash stations or emergency equipment
• Where PPE is stored
• How to report hazards or injuries

A simple safety orientation checklist can make this process quick and consistent.

Free Resource: Temporary Worker/Student Safety Orientation Checklist

Providing a standardized onboarding process helps ensure consistency, documentation, and compliance.

Click to Download: Temporary Worker/Student Safety Orientation Checklist

Need help ensuring your practice is fully OSHA-compliant? Book your FREE Compliance Risk review today!

Best Practices for Oregon Dental Practices

To maintain compliance:

• Document all training
• Provide site-specific onboarding
• Include all applicable worker types in safety plans
• Enforce PPE consistently
• Review procedures regularly

Dental practice owners already manage patient care, staffing challenges, scheduling, and regulatory requirements.

The goal is not to add complexity, but to implement simple, repeatable systems.

With a structured onboarding process, you can:

• Stay compliant with Oregon OSHA
• Reduce liability risk
• Protect your team and patient care

 

Healthcare COMPLIANCE Associates provides OSHA, Infection Control, and HIPAA compliance support for dental practices across Oregon.

 

If you have questions or would like to learn more about OSHA compliance requirements for your practice, Healthcare Compliance Associates is available as a resource. You can reach our team at 541-345-3875 ext. 1 or Support@OshaHipaaTraining.com.