Temperature and Organics Effects on ORP What is the effect of temperature and organics on ORP? See the chart below that estimates the effect. This chart illustrates a theoretical effect of temperature and organics on ORP and should not be relied upon for scientific purposes or applications. Contact Legionella Control Systems for more information and the potential application of this information with your water systems, or if you are aware of studies that more accurately quantify this effect. Effect of Temperature and Organics on ORP (Free Chlorine ~1.0 ppm) Suggested Systems Monochlorine System for Legionella Control Legionella Control Systems – Mixed Oxidant Solution (MOS) Partner with experts who understand ORP and have the engineering and technical expertise to ensure the best solution for your facility. Schedule your risk assessment and testing today—contact us at [email protected] or call 888-416-8626. Request Proposal Contact Us