How long must chemical sampling results be kept?

Chemical sampling results must be kept for 10 years to ensure that there is a traceable record of water quality data that aligns with regulatory requirements and standards set forth by organizations that oversee water safety and distribution. This duration allows for adequate historical data analysis to identify trends, assess compliance with health and environmental standards, and support any regulatory audits. Retaining records for 10 years also helps in assessing the long-term effectiveness of water treatment processes, thereby enhancing public health and safety. Keeping this data accessible facilitates any necessary investigations or public inquiries regarding water quality over a significant period.