<![CDATA[Abstract: In Barangay New Binanuaanan, Pili, Camarines Sur, many residents not connected to the Pili Water District (PIWAD) depend on distant water pumps and springs for drinking water, which they store for later use. The safety of this stored water, particularly after prolonged storage, has not been previously assessed. This study aims to evaluate the potability of week-long stored water samples from two common sources: a private water pump (Sample 1) and an undeveloped spring (Sample 2). Using the Multiple Tube Fermentation Technique (MTFT), microbiological analyses were conducted by the Metropolitan Naga Water District to determine the presence of total and fecal coliforms. Sample 1 yielded 8.0 Most Probable Number (MPN)/100 mL for both fecal and total coliforms, while Sample 2 showed <1.1 MPN/100 mL for the same indicators. These values were compared to the Department of Health (DOH) standards for drinking water. The results indicate that only the spring water (Sample 2) remained potable after a week of storage, while the pump water (Sample 1) became microbiologically unsafe. This finding underscores the need for improved access to safe water sources and encourages further research on water quality and safe storage practices in underserved communities. ]]>
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