Which parameter measures water clarity and suspended solids content?

• A. Conductivity
• B. Alkalinity
• C. pH
• D. Turbidity

Answer: (D)

The main concept is understanding which measurement reflects how clear water is and how much stuff is floating in it. Turbidity directly captures this because it gauges how much light is scattered by suspended particles. The cloudier the water, the higher the turbidity, and the more suspended solids it contains. This makes turbidity the best indicator of both water clarity and suspended solids content.

Conductivity, on the other hand, measures how well water conducts electricity, which relates to dissolved ions and overall dissolved solids rather than suspended particles. pH tells us how acidic or basic the water is, and alkalinity indicates the buffering capacity to resist pH changes. These properties describe chemical conditions, not how clear the water appears or how many solids are suspended.