Oxidation Reduction Potential (ORP) testing is measured in what unit?

Oxidation Reduction Potential (ORP) testing is indeed measured in millivolts (mV). This unit represents the electrical potential generated by the oxidation and reduction reactions occurring in the water, providing a quantitative measure of the water's sanitation level, specifically regarding its ability to oxidize contaminants and pathogens. The ORP value indicates the effectiveness of disinfectants like chlorine in the water; higher mV readings generally correlate with higher disinfection efficacy.

Understanding ORP is critical for pool operators, as maintaining appropriate ORP levels ensures water safety and comfort for swimmers. Consequently, monitoring and maintaining the ORP level in a pool environment is essential for effective pool management. Other units listed in the options measure different chemical properties: pH indicates acidity or alkalinity, ppm refers to concentration, and g/L is a mass concentration measure and does not relate to the redox potential.