Which pH measurement indicates that water is basic?

A pH measurement higher than 7 indicates that water is basic or alkaline. In this case, a pH of 8.3 is clearly above 7, which qualifies it as basic water.

To provide context, pure neutral water has a pH of 7.0. As the pH value increases above this neutral point, the water becomes increasingly basic. In contrast, pH values below 7 indicate acidity. Therefore, the higher the pH, the more basic the water is, making a pH of 8.3 a definitive indicator of basicity.