Mayville City Of--water Dept 39 1st Ave Nw Mayville, ND 58257 Phone : (701) 788-3721 Business Category Government Offices-City Village & Twp Government Offices State & Local Government Offices & Public Schools Mayville Water Department 34 1st Ave Sw Mayville, ND 58257 Phone : (701) 788-3721 Business Category Water & Sewage Companies-Utility Water Supply Regulation & Admin Of Communications Electric Gas & Other Utilities