When should microbiological samples be collected aside from monitoring compliance?

Collecting microbiological samples from new and repaired water lines or disinfected wells is crucial for ensuring water quality and safety. This is because any new installation or repair can introduce contaminants or disturb existing ones in the system. It is vital to test the water to confirm that it is safe for consumption and free from harmful microorganisms following such actions.

When new pipes are installed or repairs are made, there is potential for bacteria and other pathogens to enter the system if proper procedures are not followed during construction or maintenance. Similarly, when disinfection processes are completed, microbiological sampling helps verify the effectiveness of the disinfection procedure and confirms that no unwanted microorganisms remain in the water supply.

While collecting samples during routine testing and after heavy rainfall may be important for overall monitoring, the specific focus on new and repaired infrastructures addresses immediate safety concerns that can arise from those activities. Undertaking sampling before maintenance activities, on the other hand, is less relevant compared to the priority placed on confirming the safety of newly constructed or restored systems.