Copper-Silver Ionization Legionella Experts

Why Copper-Silver Ionization Works for Legionella

Copper-silver ionization (CSI) is a proven, clinically effective method for controlling Legionella, the bacterium responsible for Legionnaires’ disease, a severe and preventable form of pneumonia. This method introduces positively charged copper (Cu2+) and silver (Ag+) ions into potable and utility water systems. These ions disrupt cellular processes: copper weakens the bacterial cell wall while silver causes cell death (lysis). The result is long-lasting, non-chemical disinfection throughout a facility’s plumbing infrastructure.

Unlike oxidizing disinfectants such as chlorine, CSI offers stable residuals that persist across the entire hot water system. This helps ensure that Legionella is attacked at multiple points within the plumbing distribution network, not just at the point of treatment.

Where CSI Is Used

CSI systems are engineered specifically for environments where the risk of Legionella exposure is higher, including:

• Healthcare facilities and hospitals
• Long-term care centers and nursing homes
• Hotels and large multi-unit buildings
• Schools, universities, and public institutions

These systems protect vulnerable populations by providing reliable Legionella control in both potable and utility water systems.

How Copper-Silver Ionization Systems Work

CSI introduces copper at concentrations of approximately 0.1 to 0.8 ppm and silver at 30 to 80 ppb, both well within EPA regulatory limits (1.3 ppm for copper, 100 ppb for silver). These ions circulate throughout the system, continuously disinfecting without creating harmful byproducts.

None of the long-term mitigation requires building evacuation. Only the remediation. One of the advantages of CSI is that it typically does not require building evacuations during remediation. This makes it especially practical for healthcare, correctional, and residential facilities that cannot easily displace occupants during disinfection procedures.

CSI System Sizing and Design

Temperature is not relevant for CSI design. 

Designing an effective CSI system requires expert evaluation of the facility’s water characteristics. Temperature of water does not effect CSI performance, so it is not listed below. Factors considered include:

• Water consumption rates
• Plumbing design and age
• Systems (e.g. softeners)
• Water chemistry

Legionella Control Systems performs a detailed engineering site visit and completes a CSI datasheet that captures all relevant system parameters. This data is then used to design the exact system configuration needed to meet the facility’s demands.

The Importance of Expertise in Legionella Control

Proper implementation and ongoing management of a copper-silver ionization system requires deep expertise. Copper and silver ion levels must be consistently monitored to maintain effective disinfection. Legionella Control Systems offers both manual and inline testing options to simplify this process.

More importantly, independent guidance ensures that the CSI solution is tailored to the specific challenges of your facility, not driven by a generic product recommendation. With experienced engineers and ASSE 12080-aligned risk assessments, Legionella Control Systems helps you make informed decisions that are both compliant and effective.

Get Expert Help with Copper-Silver Ionization for Legionella

If you’re unsure whether copper-silver ionization is the right solution or want to evaluate the performance of your current system, Legionella Control Systems can help. Our team provides:

• Engineering assessments
• Legionella testing
• CSI system design and installation
• Ongoing water quality monitoring
• Equipment leasing or purchasing options

Contact Legionella Control Systems at [email protected] or call 888-416-8626.