Water Nuggets Practice Exam 2026 - Free Practice Questions and Study Guide

A high pH in water chemistry plays a crucial role in the formation of certain compounds, particularly Total Trihalomethanes (THMs). When water is treated with chlorine or chlorinated compounds, the presence of higher pH levels encourages reactions that can lead to the formation of THMs.

These compounds are byproducts of chlorination, and their formation is favored in alkaline conditions. This is due to the more pronounced chlorination reactions that occur with organic matter and other constituents in the water when pH levels rise. Thus, the statement that a high pH favors the formation of Total Trihalomethanes highlights the chemical dynamics involved in water treatment processes.

In contrast, Haloacetic Acids (HAAs) formation is less pronounced under high pH conditions. They tend to be produced more effectively at lower pH values. Understanding the influence of pH helps in controlling and mitigating the formation of harmful disinfection byproducts in water systems, making it essential knowledge for water quality management. Therefore, the option indicating that high pH favors Total Trihalomethanes accurately reflects the chemical behaviors occurring in chlorinated water systems.