Harlowton Sewer Lagoon Harlowton, MT 59036 Phone : (406) 632-4445 Business Category Government Offices-City Village & Twp Legislative Bodies Harlowton City Of--sewer Logoon Harlowton, MT 59036 Phone : (406) 632-4445 Business Category Government Offices-City Village & Twp Government Offices State & Local Government Offices & Public Schools