What is a common characteristic of inorganic substances measured in water quality analysis?

Inorganic substances are a broad category that includes a wide range of compounds, primarily consisting of minerals, metals, and salts. In the context of water quality analysis, these substances are significant because they can influence the physical, chemical, and biological characteristics of water.

Metals, such as lead, mercury, and copper, as well as salts like sodium chloride, are common examples of inorganic substances found in water. Their presence can affect water quality and can be indicators of pollution or nutrient levels. Additionally, many inorganic substances are essential for aquatic life, but they can also be harmful at high concentrations.

Choosing this answer reflects an understanding of the essential role that inorganic constituents play in water chemistry and their implications for environmental health and safety.