Within how many hours must repeat bacti samples be collected?

The requirement to collect repeat bacteriological (bacti) samples within 24 hours is critical for ensuring the safety and quality of drinking water. This timeframe is established to effectively address any potential contamination issues quickly, preventing any adverse health impacts on the public.

Collecting repeat samples within this 24-hour window allows operators to confirm or rule out the presence of harmful bacteria, such as E. coli or coliforms, which could indicate the presence of pathogens in the water supply. By acting promptly, water operators can implement necessary corrective actions, such as disinfection or system flushing, to ensure that the water remains safe for consumption.

This timeline ensures that any potential contamination can be tracked back to its source, and the public can be informed or preventative measures can be put in place without significant delay. The 24-hour requirement balances the need for timely action with practical considerations for sample collection and analysis.