What is the minimum number of coliform samples all water systems must collect each month?

The minimum number of coliform samples that all water systems must collect each month is one. This requirement is established to monitor the quality of drinking water and ensure it is safe for public consumption. Regular testing for coliform bacteria is essential because the presence of these bacteria can indicate contamination by fecal matter or other pathogens, which can pose serious health risks to consumers.

Taking at least one coliform sample each month allows water systems to detect potential contamination issues promptly. If the initial sample shows the presence of coliform bacteria, additional follow-up samples may be required to assess the extent of the contamination and to implement corrective actions. This foundational requirement ensures that water systems maintain high-quality standards and protect public health.

While some larger systems may be required to collect more samples based on their size, population served, or specific state regulations, the baseline requirement across all systems is one sample per month.