Farming is a major source of livelihood in rural households in the Philippines. Farming systems in the country are complex, multi-faceted, and geared to promote efficient production and a steady source of income. However, these have also wrought unwanted consequences on the environment, water pollution and groundwater depletion. This study was conducted to evaluate the quality of water in Manggalang, Quezon, which is a farming community. The prospective cohort study was conducted by mapping nine deep wells within Barrio Manggalang in Quezon as the main sources of water supply. The sample specimens of drinking water were randomly selected. Data were collected by means of a self-administered questionnaire and method of examination was based on existing Sanitation Code of the Philippines.