How long should chemical analysis records be maintained?

The requirement for maintaining chemical analysis records in drinking water laboratories is often set by federal and state regulations, which generally dictate specific retention periods to ensure compliance and traceability of data. The correct answer, maintaining records for 10 years, aligns with the guidelines established by the Environmental Protection Agency (EPA) and various regional authorities. This duration allows sufficient time for any necessary audits, investigations, or assessments regarding water quality and compliance with health standards. By retaining records for 10 years, laboratories ensure that they are prepared to provide historical data if requested by regulatory bodies or in response to instances of contamination or public health concerns. This period also supports the overall integrity of the water monitoring program, reinforcing public confidence in safe drinking water.