How often should routine monitoring for coliform bacteria be conducted in public water systems?

Routine monitoring for coliform bacteria in public water systems should be conducted monthly. This regular testing is essential because coliform bacteria can indicate the presence of harmful pathogens in the water supply. Monthly monitoring ensures that any contamination is detected promptly, allowing for swift action to protect public health.

Public water systems are required to adhere to strict regulations set by the Environmental Protection Agency (EPA), which stipulate that a certain number of samples must be collected and tested for coliform bacteria each month, depending on the size of the population served by the system. This frequency is critical for maintaining water quality and ensuring the safety of the drinking water supply. By monitoring on a monthly basis, operators can assess trends over time, implement corrective measures as necessary, and comply with regulatory requirements.