The pH level of pure water is 7, which is considered neutral on the pH scale. The scale ranges from 0 to 14, where values below 7 indicate acidity, and those above 7 indicate alkalinity. Pure water, being neutral, does not favor either acidity or basicity. However, the pH of natural water sources can fluctuate due to dissolved substances, pollutants, or organic matter. Maintaining the pH level of water is crucial for aquatic life and ecosystems, as many organisms have specific pH ranges within which they thrive.