True color in water is measured by removing all what?

True color in water specifically refers to the color that remains after the removal of suspended solids. This is significant because suspended solids, like particles and organic matter, can contribute to the visual appearance of water and affect its color.

When suspended solids are removed, the resulting color measurement reflects the true characteristics of the dissolved substances within the water, such as colored organic compounds or metals. This measurement is crucial for water quality analysis since it helps differentiate between color caused by actual dissolved substances versus that caused by particulate matter.

While impurities, dissolved gases, and mineral content may affect water quality, they do not specifically relate to the measurement of true color when suspended solids are extracted. Therefore, focusing on suspended solids allows for an accurate assessment that reflects the inherent qualities of the water’s dissolved materials without the interference of particulates.