What are the two components that make up the total residue in water quality assessments?

The total residue in water quality assessments refers specifically to the mass of all substances present in water, excluding water itself. The two key components that make up the total residue are total suspended solids (TSS) and total dissolved solids (TDS).

Total suspended solids include particles that are suspended in water and can be removed by filtration. These particles may consist of organic matter, sediments, and other particulates. Total dissolved solids, on the other hand, encompass all substances that are dissolved in water, including minerals, salts, and organic matter. Together, TSS and TDS provide a comprehensive measure of the quality and composition of the water, as they account for both visible and invisible contaminants that can impact aquatic life and overall water health.

The distinction between suspended and dissolved solids is crucial in water quality analysis, making this understanding vital for assessing the health of aquatic ecosystems and ensuring safe water for consumption and recreational use.