In water sampling, what is pH a measure of?

pH is a measure of the acidity or alkalinity of water, which is crucial in determining the quality of water for various uses. The pH scale ranges from 0 to 14, with values below 7 indicating acidic conditions, values above 7 indicating alkaline conditions, and a value of 7 being neutral. This measurement is vital for numerous biological and chemical processes in aquatic ecosystems, as well as for regulatory compliance and water treatment practices.

Understanding the pH level helps water quality professionals assess the suitability of water for drinking, recreation, irrigation, and habitat health. For instance, extreme pH levels can be harmful to aquatic life, disrupt chemical reactions, and affect the overall ecosystem balance. This makes monitoring pH an essential aspect of water sampling programs.