Invorio is a comune (municipality) in the Province of Novara in the Italian region of Piedmont , located about 100 kilometres (62 mi) northeast of Turin and about 35 kilometres (22 mi) northwest of Novara. Invorio borders the following municipalities: Ameno, Arona, Bolzano Novarese , Borgomanero , Briga Novarese , Colazza , Gattico-Veruno, Gozzano, Meina , and Paruzzaro .