Chlorine Dioxide Concentration and ORP What is the relationship between chlorine dioxide concentration and ORP? See the chart below that estimates the relationship. This chart illustrates a theoretical relationship between chlorine dioxide concentration and ORP and should not be relied upon for scientific purposes or applications. Contact Legionella Control Systems for more information and the potential use of this information with your water systems, or if you are aware of studies that more accurately quantify this relationship. Relationship Between Chlorine Dioxide Concentration and ORP Suggested Systems Legionella Control Chlorine Dioxide Systems We can help you with your Legionella risk assessment, Legionella testing, Legionella remediation, and everything else you need to control Legionella. Contact the Legionella experts at [email protected] or 888-416-8626 right now. Request Proposal Contact Us