Middleburg Wastewater Plant 500 E Main St Middleburg, VA 20117 Phone : (540) 687-6969 Business Category Government Offices-City Village & Twp Legislative Bodies Middleburg Town Of--wastewater Treatment Plant Middleburg, VA 20117 Phone : (540) 687-6969 Business Category Government Offices-City Village & Twp Government Offices State & Local Government Offices & Public Schools