What is the hold time for conductivity measurements?

The hold time for conductivity measurements is 28 days. This duration is established to ensure that samples remain stable and retain their integrity for accurate analysis when they are measured in a laboratory setting. Conductivity, which indicates the ability of the water to conduct electrical current, can change over time due to biological growth, temperature variations, or chemical reactions that might occur in the sample. By adhering to the 28-day hold time, analysts can ensure that they are evaluating the sample's properties as they were initially collected. This is critical for compliance with regulatory requirements and for maintaining the reliability of the water quality assessments being performed.