ORP Levels

Modified on Tue, 23 May 2023 at 10:27 AM

ORP (Oxidation-Reduction Potential) is an important factor in pool water chemistry, especially for maintaining proper water sanitation. ORP measures the ability of a sanitizer (usually chlorine) to oxidize or disinfect contaminants in the water.

The ORP value is measured in millivolts (mV) and typically ranges from -700 to +700 mV. A higher ORP value indicates that the sanitizer is more effective at oxidizing contaminants, while a lower ORP value indicates that the sanitizer is less effective.

In a swimming pool, the recommended ORP value is between +650 and +750 mV. This ensures that there is enough sanitizer in the water to disinfect and oxidize contaminants, such as bacteria and algae, and maintain proper water clarity.

To maintain the proper ORP level in a pool, the Crystal Water Monitor sensors will take readings over 1000 times per week. If the ORP level is too low, the Crystal Water Monitor mobile app will recommend adding additional sanitizer to increase the ORP value. If the ORP level is too high, it may indicate that there is too much sanitizer in the water, which can cause skin and eye irritation for swimmers. In this case, diluting the water or reducing the amount of sanitizer added can help bring the ORP level back into the recommended range.