How long should records on bacterial analysis be kept?

Records of bacterial analysis in water distribution systems are typically retained for a duration of five years. This timeframe is established to ensure that there is adequate documentation available for review in case of any water quality concerns or contamination events. Keeping these records allows regulatory agencies and water operators to track trends, monitor water quality over time, and comply with health and safety standards.

Retention of bacterial analysis data is crucial for maintaining public health and ensuring that the water supply meets safety requirements. By retaining records for five years, water authorities can also support their efforts in maintaining transparency and accountability to the communities they serve. This standard aligns with practices recommended by various regulatory bodies and guidelines in the field of water distribution and management.