What is a common method for measuring pH in surface water?

Using a pH meter or pH test strips is a common and effective method for measuring pH in surface water because these tools provide direct and immediate measurements of the acidity or alkalinity of the water. A pH meter is a precise electronic device that gives a numerical value for the pH level, allowing for accurate assessments of water quality. On the other hand, pH test strips offer a quick, user-friendly alternative by changing color based on the pH level of the water.

Both methods are advantageous for fieldwork as they allow for rapid analysis, which can be crucial when monitoring surface water bodies affected by environmental changes or pollution. Additionally, these methods are relatively straightforward to use and require minimal training, making them accessible for a variety of users, from researchers to citizen scientists. This contrasts with the other options, such as using a conductivity meter, visual inspection, or collecting samples for laboratory testing, which either do not directly measure pH or involve more complex or time-consuming methods.