Suffolk County Water Authority lays claim to being the nation's largest groundwater supplier. This is the western regional office supplying water to the Town of Smithtown, Town of Huntington, Town of Babylon and parts of Town of Islip. It provides drinking water filtered through Granular Activated Carbon filters to residential and commerical customers. Residents can request a hook up, an explaination of their bill, meter readings, notification of moving and more by visiting their office. Suffolk County Water Authority is also responsible for overseeing and maintaining fire hydrants.