What should be done with water samples prior to transporting them to the laboratory?

Keeping water samples cool and dark prior to transporting them to the laboratory is essential for preserving their integrity and ensuring the validity of the analysis. Temperature fluctuations and exposure to light can lead to changes in the chemical and biological composition of the samples, which might result in inaccurate test results. By maintaining a controlled environment, you minimize the risk of microbial growth, chemical reactions, and other factors that can alter the sample's properties. This helps ensure that the laboratory receives samples that accurately represent the original water source and can be tested appropriately for contaminants or other parameters of concern.