Mountainside Police Department 1385 Us Highway 22 Mountainside, NJ 07092 Phone : (908) 232-8100 Business Category Police Departments Mountainside Fire Department 1385 Route 22 Mountainside, NJ 07092 Phone : (908) 232-8100 Business Category Fire Departments Mountainside Rescue Squad 1385 Route 22 Mountainside, NJ 07092 Phone : (908) 232-8100 Business Category Government Offices-City Village & Twp Police Departments Fire Departments Government Offices State & Local Government Offices & Public Schools