Swimming pool water clarity is measured in terms of

Swimming pool water clarity is primarily assessed using two methods: NTU (Nephelometric Turbidity Units) and Secchi disk readings. NTU is a standard measure used to quantify how clear the water is, with lower values indicating clearer water. The Secchi disk is a simple tool used to estimate water clarity by measuring the depth at which the disk becomes invisible when submerged in water.

Both NTU and Secchi disk readings provide valuable information about the clarity of water, which is an important aspect of water quality in swimming pools. Poor clarity can indicate problems such as the presence of contaminants, excessive algae growth, or inadequate filtration.

While ORP (Oxidation-Reduction Potential) is critical for understanding the chemical composition of water – particularly its ability to disinfect – it does not directly measure water clarity. Therefore, the combination of NTU and Secchi disk readings effectively captures the necessary data for assessing swimming pool clarity.